Andyroo
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[Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 8:42 am

Had a very odd issue at 2AM today :lol:

Building a Pi Zero v1.1 with a new SD card - SanDisk A1 rated Extreme version
Valid download of Stretch with desktop only
Used latest version of Etcher - verified fine
SSH and WiFi config via files

No issues setting up or running apt update and upgrade
Set up VNC to map to my account with no problems
Did a power off / onto make sure VNC report Pi active on the website - no issues
Shutdown Pi from command line and put into case

Did NOT remove SD card

Powered back on - no blinken flashen light
Was not using Pi supply :oops: so powered off and unboxed supply
Powered back on - still dead and no light at all - no WiFi activity either

After trying two more supplies and checking 3v3 and 5V (both fine and stable) I checked the SD card in my Mac to find it could not read the thing at all. No boot partition and it was reporting no other partitions on the drive.

Disk Util would not format it - hung at trying to load partitions

Tried my old (last year) version of SD formatter and it failed to format and closed down...
Downloaded latest version on SD formatter
It failed to format but reported the card was 31Gb in size - surprised me as it was marked 16Gb :shock:

This time the program reported:
[ERROR] Invalid end of sector signature: 0x0000
[ERROR] fat_check_validate_boot_sector returned error: 22 (Invalid argument)
[ERROR] Initializing cached values failed: 22 (Invalid argument)
[ERROR] Generated invalid volume. fat_volume_create returned: 22 (Invalid argument)
This card was brand new direct from Amazon (not a reseller) and one of three I bought two weeks ago. The other two are fine and been in a couple of Pi computers (at least) and been ‘ at least twice.

Packaging / printing marks on the card and carrier / plastic holders all look the same (even the inside of the cardboard outer) so I have either a very good fake or three fakes the same! Note to self - throw old packaging out if cards working :oops:

I have a horrid feeling that SanDisk are using 32Gb cards and down rating them to 16Gb if they are faulty and somehow pulling or adding back the power has opened the size data but not the actual data store...

Solution - return back to Amazon and I’ll see if they take the old one today :lol:
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FTrevorGowen
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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 3:52 pm

If you haven't yet returned the card, OOC, if you have a Pi that USB boots can you put it in it's card slot and report back with the result of:

Code: Select all

cat /sys/block/mmcblk0/device/cid
(It may be useful to compare that with the results for the other, working cards - no USB boot needed for that)
More info. here:
http://www.cpmspectrepi.uk/raspberry_pi ... cking.html
but, as yet, I've not made the tools available on the site (will do so at some point if there's enough interest)
Trev.
Still running Raspbian Jessie on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W) but Stretch on my 2xP3A+, P3B+, P3B, B+, A+ and a B2. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 4:00 pm

Let me try and dig one out the disk Pis are boxed due to building work :cry: - Amazon have delayed pick up by one day this afternoon :)

It will be awhile.
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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 4:13 pm

Direct from Amazon doesn't mean it isn't counterfeit. I bought a counterfeit BMW ignition switch from an Amazon seller. It even had the BMW logo.

There are utilities that can check the actual capacity of SD cards. I bought some counterfeits that were labeled as 64GB, but they were actually hacked 8GB cards. Once you filled the actual capacity, previously written data was overwritten. It took me weeks to get a refund, but I got 4 free USB and SD adapters.

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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 4:17 pm

Andyroo wrote:
Thu May 23, 2019 4:00 pm
Let me try and dig one out the disk Pis are boxed due to building work :cry: - Amazon have delayed pick up by one day this afternoon :)

It will be awhile.
I've a few SanDisk cards myself, for which I've logged and decoded the CID data. I'm wondering if there's any "common factors" for "problem cards" esp. the OID, PNM, PRV and MDT data. For example the OID for Kingston cards, unlike the SanDisk cards I have, can vary, suggesting "different internals".
Trev.
Still running Raspbian Jessie on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W) but Stretch on my 2xP3A+, P3B+, P3B, B+, A+ and a B2. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 4:20 pm

dl324 wrote:
Thu May 23, 2019 4:13 pm
Direct from Amazon doesn't mean it isn't counterfeit. I bought a counterfeit BMW ignition switch from an Amazon seller. It even had the BMW logo.
There are utilities that can check the actual capacity of SD cards. I bought some counterfeits that were labeled as 64GB, but they were actually hacked 8GB cards. Once you filled the actual capacity, previously written data was overwritten. It took me weeks to get a refund, but I got 4 free USB and SD adapters.
Capacity checking aside, I'm also curious to see if whether such hacked cards share some common (false) CID info.
Trev.
Still running Raspbian Jessie on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W) but Stretch on my 2xP3A+, P3B+, P3B, B+, A+ and a B2. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 4:41 pm

dl324 wrote:
Thu May 23, 2019 4:13 pm
Direct from Amazon doesn't mean it isn't counterfeit. I bought a counterfeit BMW ignition switch from an Amazon seller. It even had the BMW logo.

There are utilities that can check the actual capacity of SD cards. I bought some counterfeits that were labeled as 64GB, but they were actually hacked 8GB cards. Once you filled the actual capacity, previously written data was overwritten. It took me weeks to get a refund, but I got 4 free USB and SD adapters.
Agreed totally - but often there are small signs (normally in the packaging esp inside) and like I said in the OP these three matched etc to a tee - and the print / size matches others in the local shops so my gut feeling is this is a real one. I've had fakes before (back to the old CF cards) from my photography days but I know the forgers get better. Also this is failing the wrong way - it started at 16Gb but everything I have reports its now 32Gb (inc 1 linux Lenovo laptop, 1 Windows box and three programs on my Mac).
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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 5:15 pm

For some reason the Pi 3B will not recognise any card - I have a feeling that I disabled something to stop the constant access and one task running at 40%+ CPU as it did not have a card in it but I cannot find anything in my build notes :oops: other than these notes and thats not them.

Not to worry though - I've put it in to my Lenovo (elementary OS 5.0 juno / Ubuntu - bionic) and get:

Code: Select all

035344534430333280ffffffff006201
and gparted reports 30.61 GiB

I've also tried the first of the 'working' ones and gparted is reporting 14.84 GiB and that has a cid of:

Code: Select all

0353445343313647801c1e25ee012901
The last one of the three (14.84 GiB in gparted) reports a cid of:

Code: Select all

035344534331364780c50a158f013101
Hope this helps - let em know if you need anything else doing. I can zap the 3B disk if you need me to do something Pi related tonight or in the morning (assuming I wake up) - it was due to be scrubbed from the test box (hence getting out quickly) :lol:
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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 5:52 pm

https://goughlui.com/2014/01/02/project ... ster-data/

Using the URL above I think that your first card is a 32GB card from 2006, the other cards 16GB from 2012/13
The first card has an interesting serial number

I tried to make the information readable:

Code: Select all

CID:                   035344534430333280ffffffff006201    0353445343313647801c1e25ee012901    0353445343313647801c1e25ee012901
Manufacturer ID:       0x03                                0x03                                0x03                            
OEM/Application ID:    0x5344                              0x5344                              0x5344                          
Product Name:          0x5344303332 [ASCII: SD032]         0x5343313647 [ASCII: SC16G]         0x5343313647 [ASCII: SC16G]     
Product Revision:      0x80 [BCD: 8.0]                     0x80 [BCD: 8.0]                     0x80 [BCD: 8.0]                 
Product Serial Number: 0xffffffff                          0x1c1e25ee                          0xc50a158f                      
Manufacturing Date:    0x062 2006/2                        0x129 2012/9                        0x131 2013/1                    
Last edited by Ernst on Thu May 23, 2019 6:01 pm, edited 1 time in total.
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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 6:00 pm

Ernst wrote:
Thu May 23, 2019 5:52 pm
https://goughlui.com/2014/01/02/project ... ster-data/

Using the URL above I think that your first card is a 32GB card from 2006, the other cards 16GB from 2012/13
The first card has an interesting serial number
FWIW, here's my results:

Code: Select all

[email protected]:~/usdcard_tools-0.0 $ ./src/cid_decoder -oldCID -X
cid_decoder.c Version 0.01 {Exp}, [23/05/2019], (c) F_Trevor_Gowen
		<--| Package usdcard_tools_0.0 |-->
<cid_decoder.arg>	fopen: No such file or directory
cid_decoder.arg not found
Initialising cid ...
Opened rawcid ...
035344534430333280ffffffff006201
raspiP3Bplus18 sdcard cid status:
RAWCID 035344534430333280ffffffff006201
MID    0x03
OID    0x5344 (SD)
PNM    0x5344303332 (SD032)
PRV    0x80 (8.0)
PSN    0xffffffff
RSVD   0x0
MDT    0x062 (2/2006)
CRC+1  0x01
[email protected]:~/usdcard_tools-0.0 $ ./src/cid_decoder -oldCID -X
cid_decoder.c Version 0.01 {Exp}, [23/05/2019], (c) F_Trevor_Gowen
		<--| Package usdcard_tools_0.0 |-->
<cid_decoder.arg>	fopen: No such file or directory
cid_decoder.arg not found
Initialising cid ...
Opened rawcid ...
0353445343313647801c1e25ee012901
raspiP3Bplus18 sdcard cid status:
RAWCID 0353445343313647801c1e25ee012901
MID    0x03
OID    0x5344 (SD)
PNM    0x5343313647 (SC16G)
PRV    0x80 (8.0)
PSN    0x1c1e25ee
RSVD   0x0
MDT    0x129 (9/2018)
CRC+1  0x01
[email protected]:~/usdcard_tools-0.0 $ ./src/cid_decoder -oldCID -X
cid_decoder.c Version 0.01 {Exp}, [23/05/2019], (c) F_Trevor_Gowen
		<--| Package usdcard_tools_0.0 |-->
<cid_decoder.arg>	fopen: No such file or directory
cid_decoder.arg not found
Initialising cid ...
Opened rawcid ...
035344534331364780c50a158f013101
raspiP3Bplus18 sdcard cid status:
RAWCID 035344534331364780c50a158f013101
MID    0x03
OID    0x5344 (SD)
PNM    0x5343313647 (SC16G)
PRV    0x80 (8.0)
PSN    0xc50a158f
RSVD   0x0
MDT    0x131 (1/2019)
CRC+1  0x01
Note the different MDT interpretation from @Ernst's linked site (I consulted a different site: https://goughlui.com/static/multicid.htm to write my code)
Trev.
Still running Raspbian Jessie on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W) but Stretch on my 2xP3A+, P3B+, P3B, B+, A+ and a B2. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 6:12 pm

FTrevorGowen wrote:
Thu May 23, 2019 6:00 pm

FWIW, here's my results:

Code: Select all

MDT    0x129 (9/2018)

MDT    0x131 (1/2019)
According to what I found the date code should be 3 BCD Characters YYM where actual year is is 2000+YY,
but your interpretation makes more sense.

Update: I found evidence that the date code is one byte and one nibble, the byte is the year (+2000) in binary and the nibble is the month. The date code I found on a 32GB Micro SD (SL32G) is 0x10b [BCD: 1 0/11] = 2000 + 16 / 11.
Last edited by Ernst on Thu May 23, 2019 6:32 pm, edited 1 time in total.
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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 6:29 pm

Interesting - Have a look at the front of the cards:
IMG_2583.jpg
IMG_2583.jpg (34.58 KiB) Viewed 1401 times
The 'faulty' one is on the right as you look at them. Nothing significant (the curved line is a light glare) except the slight difference in quality of the printing but that may just be a batch difference given how close it is.

On the back (again 'faulty' on the right as you look at them):
IMG_2584.jpg
IMG_2584.jpg (32.24 KiB) Viewed 1401 times
The significant wear on the tracks are not visible to the eye - in fact I had to double check (and stick it in the Mac) to convince myself the OK one was the worn one :!: and I had not flipped them over when getting the phone out!
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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 10:42 pm

The only date I can pin down is 2007 on a copyright statement - but that means nothing as the packs could be printed at anytime after the cards are made...

Going by https://www.sdcard.org/consumers/index.html A1 was introduced in 2016 so anything made before this cannot be A1 :lol:
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Re: [Solved] Pi doubled SanDisk SD card size

Thu May 23, 2019 11:28 pm

Andyroo wrote:
Thu May 23, 2019 8:42 am
...
Shutdown Pi from command line and put into case

Did NOT remove SD card
The is likely where the problem happened.

It's easy to damage a card when doing that. You should remove the SD card before installing or removing a Raspberry Pi case.

Powered back on - no blinken flashen light
Was not using Pi supply :oops:
What PSU were you using?

After trying two more supplies and checking 3v3 and 5V (both fine and stable) I checked the SD card in my Mac to find it could not read the thing at all. No boot partition and it was reporting no other partitions on the drive.
Yup, you killed your card.

This card was brand new direct from Amazon (not a reseller)
Irrelevant, since Amazon does not maintain a separate inventory for resellers (all like parts go in the same bin).

I have a horrid feeling that SanDisk are using 32Gb cards and down rating them to 16Gb if they are faulty...
Nothing to be horrified about. That's common practice to improve chip yields (everyone does it). Although in a less specific way.

Memory chips are tested at time of manufacture, and chips with bad blocks are partially disabled, so that what remains is all good. What may have been manufactured to be a 32GB chip ended up being marked (and used) as a 16GB chip.

Although it's unlikely you could re-enable that original capacity (they're usually disabled at hardware level). What you are seeing is probably an error in the software reading the damaged card.
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Re: [Solved] Pi doubled SanDisk SD card size

Fri May 24, 2019 12:03 am

Highly unlikely the card was damaged as the case is very large compared to the Pi and the card is no where near an edge or anything that would catch or press on it. The Pi is held in by screws and not pushed under any retaining clips.

I’ve had zero issues with the power supplies on the zeros W and have four running from them normally. The one that was in was a 5V 1.8 amp regulated switch mode. I’ve also used chargers and one is plugged into my router at the mo with zero issues to date.

Not convinced over the warehouse layout having been around the Glenrothes site before it moved away from the town :D but that was a few years ago now and they where a bit smaller then.

I’ve been using SD cards in both formats for many years and this is the first one that’s died in this way - over use in cameras yes but not like this. It was so odd I thought folk may find it interesting.

And as for downgrading chips - I expect my chips to be perfect but then again my grandparents ran a fish and chip shop so I was brought up on perfect chips (especially battered and twice fried) and no seconds :lol: :D :lol:

Seriously though - it’s intriguing it went up in size. It’s a shame my other linux is down till the builder done else I would see it a different distribution could come up with the same data. I tried on a VM but it cannot see the card at all as the host does not understand the format :evil:
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Re: [Solved] Pi doubled SanDisk SD card size

Fri May 24, 2019 6:16 am

Andyroo wrote:
Thu May 23, 2019 10:42 pm
The only date I can pin down is 2007 on a copyright statement - but that means nothing as the packs could be printed at anytime after the cards are made...

Going by https://www.sdcard.org/consumers/index.html A1 was introduced in 2016 so anything made before this cannot be A1 :lol:
I looked at quite a few SanDisk SD cards last night and I noticed that there is some logic, but not consistent, in the CID product name used by this company. Looking at non-Sandisk cards the product name is mostly, if not all, something like "SDn*G" , where * is the size. On the SanDisk SD (Full Size) I found "SD*" and "SU*" and on 2 other names not starting with S. On the SanDisk micro-SD cards I found "SL" on most cards and "SC" on one of the 200GB A1 cards I own.

Looking at the CIDs you found it looks (to me) that the first (bad) card is a fake because of the manufacturing date (2006/2), the product code "SD032" and the serial number "0xffffffff". Looking at the other cards I suspect that the CID product code "SC*" is used for A1 cards.
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Re: [Solved] Pi doubled SanDisk SD card size

Fri May 24, 2019 10:20 am

Maybe I should change from SanDisk to Samsung cards...

I’ve never been happy with WD drives in a corporate world or at home (had more fail than any other type) and I had hoped that they would not fiddle in the last three or so years they have owned SanDisk but this could be a warning in disguise :roll: :lol: :roll:

Obviously only SD knows the true meaning of the different codes - it could be plant ID, internal machine ID or even a specific process ID :cry:

But Amazon are due today so I can complete this thread assuming the new card runs.
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Re: [Solved] Pi doubled SanDisk SD card size

Fri May 24, 2019 10:51 am

I think you're missing the obvious answer; that an Amazon reseller sold you a fake card. That happens all the time and is the reason I buy cards from Sainsburys/Argos, Tesco or Morrisons (mobile phone depts) and keep the receipt.
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Re: [Solved] Pi doubled SanDisk SD card size

Fri May 24, 2019 12:12 pm

DougieLawson wrote:
Fri May 24, 2019 10:51 am
I think you're missing the obvious answer; that an Amazon reseller sold you a fake card. That happens all the time and is the reason I buy cards from Sainsburys/Argos, Tesco or Morrisons (mobile phone depts) and keep the receipt.
It’s quite possible (though it was Amazon themselves as the trader). It’s just been an interesting exercise in looking at SD card errors, the differences in the three from the same delivery and learning a bit more about the hardware for now.

Interestingly the new card has come today but the delivery driver knew nothing about the return and this card is copyrighted 2017. I’ll run the cid extract tonight or over the weekend.

Given how many cards I’ve used, the saving of just over £6.50 each card off Amazon over the local Sainsbury has been worth the ‘fun’ of this one dying (esp as I have learnt a little about the cards).

It a shame Micron spun off Lexar as all the photographers I knew swore by these - I know some got stung with a flood of fakes during the change over else I would have gone back to these as I’ve dropped them, drowned them, stood (and sat) on them and even had my lunch over them in my photography days :lol:
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Re: [Solved] Pi doubled SanDisk SD card size

Fri May 24, 2019 12:17 pm

How do you think a reseller can drop the price by £6.50 for a genuine product?

If you get cheapo cards you should run a F3 scan before using them for anything important. All of my Raspberries that can boot from USBs are booting from USB sticks. A couple that can't boot from a USB have a bootcode only SDCard and the root filesystem on a chrome plated spinning thing.
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Re: [Solved] Pi doubled SanDisk SD card size

Fri May 24, 2019 12:29 pm

Ernst wrote:
Fri May 24, 2019 6:16 am
...
I looked at quite a few SanDisk SD cards last night and I noticed that there is some logic, but not consistent, in the CID product name used by this company. Looking at non-Sandisk cards the product name is mostly, if not all, something like "SDn*G" , where * is the size. On the SanDisk SD (Full Size) I found "SD*" and "SU*" and on 2 other names not starting with S. On the SanDisk micro-SD cards I found "SL" on most cards and "SC" on one of the 200GB A1 cards I own.
...
Seems "consistent" with my checks of some SanDisk Ultra (some "Ideal for Android") 8Gb cards I have:

Code: Select all

Q/V	SanDisk Ultra	8GB/UHS 1	raspizero8Gb sdcard cid status:
			RAWCID 0353445355303847800b681f9200e1df
			MID    0x03
			OID    0x5344 (SD)
			PNM    0x5355303847 (SU08G)
			PRV    0x80 (8.0)
			PSN    0x0b681f92
			RSVD   0x0
			MDT    0x0e1 (1/2014)
			CRC+1  0xdf
			raspiP2BJamesA sdcard cid status:
			RAWCID 035344534c303847800e66298700e7e5
			MID    0x03
			OID    0x5344 (SD)
			PNM    0x534c303847 (SL08G)
			PRV    0x80 (8.0)
			PSN    0x0e662987
			RSVD   0x0
			MDT    0x0e7 (7/2014)
			CRC+1  0xe5
			raspiZero8Gb-2 sdcard cid status:
			RAWCID 03534453553038478043e2556600f900
			MID    0x03
			OID    0x5344 (SD)
			PNM    0x5355303847 (SU08G)
			PRV    0x80 (8.0)
			PSN    0x43e25566
			RSVD   0x0
			MDT    0x0f9 (9/2015)
			CRC+1  0x00
(See Q/V pics. here: http://www.cpmspectrepi.uk/raspberry_pi ... cards.html )
As mentioned in other thread(s) "Kingston" cards are known to vary more ie. different MID's & OID's:

Code: Select all

AB	Kingston	16Gb/C10	raspiAplus16Gb sdcard cid status:
			RAWCID 275048534431364730daa415d00106bb
			MID    0x27
			OID    0x5048 (PH)
			PNM    0x5344313647 (SD16G)
			PRV    0x30 (3.0)
			PSN    0xdaa415d0
			RSVD   0x0
			MDT    0x106 (6/2016)
			CRC+1  0xbb
AC	Kingston	16Gb/C4	raspiP3BStretch16Gb sdcard cid status:
			RAWCID 02544d53413136471918c8e3840111f9
			MID    0x02
			OID    0x544d (TM)
			PNM    0x5341313647 (SA16G)
			PRV    0x19 (1.9)
			PSN    0x18c8e384
			RSVD   0x0
			MDT    0x111 (1/2017)
			CRC+1  0xf9
AF	Kingston	32GB/C10	raspiP0W2 sdcard cid status:
			RAWCID 4134325344333247303314a58801271f
			MID    0x41
			OID    0x3432 (42)
			PNM    0x5344333247 (SD32G)
			PRV    0x30 (3.0)
			PSN    0x3314a588
			RSVD   0x0
			MDT    0x127 (7/2018)
			CRC+1  0x1f
(See AB,AC,AF pics. here: http://www.cpmspectrepi.uk/raspberry_pi ... cards.html )
Trev.
Still running Raspbian Jessie on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W) but Stretch on my 2xP3A+, P3B+, P3B, B+, A+ and a B2. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

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