Raspberry Pi Forums

Posted: **Wed Mar 18, 2015 6:50 am**

Raspberry Pi 2 RASPBIAN
Linux raspberrypi 3.18.9-v7+ #768 SMP PREEMPT Sun Mar 15 19:41:56 GMT 2015 armv7l GNU/Linux
Mar 16 2015 19:38:52
Copyright (c) 2012 Broadcom
version 51ab816b505d1b745130562908d866915c836056 (clean) (release)

I have two Intel SSD's that I wanted to set up external storage on using a Apricorn usb/sata adapter.
I used the same process of formatting and mounting for both drives.

1. Attached drive (RPI sees as sda in fdisk -l)
2. fdisk /dev/sda1, o, n, p, 1, d,d,d,c,w. (exits with no error).
3. mkfs.vfat /dev/sda1
4. vim /etc/fstab "/dev/sda1 /var/multimedia vfat users,umask=1000,rw,auto 0 0"
5. reboot

Upon rebooting I see an error that sda1 is not a block device in the logs.

And no SD* in fdisk -l.

Dmesg shows the drive connecting then disconnecting in a loop:

Code: Select all

root@raspberrypi:/home/pi# tail -f /var/log/messages
Mar 18 06:35:10 raspberrypi kernel: [ 1605.527364] sd 331:0:0:0: [sda] Sense not available.
Mar 18 06:35:10 raspberrypi kernel: [ 1605.527540] sd 331:0:0:0: [sda] Attached SCSI disk
Mar 18 06:35:13 raspberrypi kernel: [ 1608.476186] usb 1-1.4: new high-speed USB device number 94 using dwc_otg
Mar 18 06:35:13 raspberrypi kernel: [ 1608.577343] usb 1-1.4: New USB device found, idVendor=0984, idProduct=0040
Mar 18 06:35:13 raspberrypi kernel: [ 1608.577372] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Mar 18 06:35:13 raspberrypi kernel: [ 1608.577391] usb 1-1.4: Product: SATAWire
Mar 18 06:35:13 raspberrypi kernel: [ 1608.577408] usb 1-1.4: Manufacturer: Apricorn
Mar 18 06:35:13 raspberrypi kernel: [ 1608.577426] usb 1-1.4: SerialNumber: 4356504F3030333230305750
Mar 18 06:35:13 raspberrypi kernel: [ 1608.578533] usb-storage 1-1.4:1.0: USB Mass Storage device detected
Mar 18 06:35:13 raspberrypi kernel: [ 1608.579022] scsi host332: usb-storage 1-1.4:1.0
Mar 18 06:35:14 raspberrypi kernel: [ 1609.576982] scsi 332:0:0:0: Direct-Access     Apricorn SATAWire         1.08 PQ: 0 ANSI: 4
Mar 18 06:35:14 raspberrypi kernel: [ 1609.578285] sd 332:0:0:0: Attached scsi generic sg0 type 0
Mar 18 06:35:14 raspberrypi kernel: [ 1609.578661] sd 332:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
Mar 18 06:35:14 raspberrypi kernel: [ 1609.579195] sd 332:0:0:0: [sda] Write Protect is off
Mar 18 06:35:14 raspberrypi kernel: [ 1609.597402] usb 1-1.4: USB disconnect, device number 94
Mar 18 06:35:14 raspberrypi kernel: [ 1609.616162] sd 332:0:0:0: [sda]
Mar 18 06:35:14 raspberrypi kernel: [ 1609.616192] Result: hostbyte=0x01 driverbyte=0x00
Mar 18 06:35:14 raspberrypi kernel: [ 1609.616210] sd 332:0:0:0: [sda] CDB:
Mar 18 06:35:14 raspberrypi kernel: [ 1609.616223] cdb[0]=0x28: 28 00 00 00 00 08 00 00 08 00
Mar 18 06:35:14 raspberrypi kernel: [ 1609.616479]  sda: unknown partition table
Mar 18 06:35:14 raspberrypi kernel: [ 1609.617481] sd 332:0:0:0: [sda] READ CAPACITY failed
Mar 18 06:35:14 raspberrypi kernel: [ 1609.617508] sd 332:0:0:0: [sda]
Mar 18 06:35:14 raspberrypi kernel: [ 1609.617523] Result: hostbyte=0x01 driverbyte=0x00
Mar 18 06:35:14 raspberrypi kernel: [ 1609.617539] sd 332:0:0:0: [sda] Sense not available.
Mar 18 06:35:14 raspberrypi kernel: [ 1609.617738] sd 332:0:0:0: [sda] Attached SCSI disk

I plug Drive 1 into my Mac and it is mounted automatically.
In osx I re-partition the drive and reformat as exfat.

I Plug Drive 1 back in the RPI2 and get the sda connect/disconnect loop.

OK Maybe something is wrong with Drive 1.
Try Drive 2. Re-flash my SD card and repeat steps 1-5.
And get connect/disconnect loop with the new drive.

Now I am lost. The only thing I have not tried is using an 2nd SD card with another distro, which I am working on now.

Anyone experience anything similar?

Posted: **Wed Mar 18, 2015 10:13 am**

It may be a USB Power issue, you need a good quality PSU 5V2A, if it is a PSU with a seperate USB Cable then ensure good quality cable.

Then add to config.txt the following

Code: Select all

max_usb_current=1

https://projects.drogon.net/testing-set ... berry-pi-b

Posted: **Wed Mar 18, 2015 11:48 am**

fruitoftheloom wrote:It may be a USB Power issue, you need a good quality PSU 5V2A, if it is a PSU with a seperate USB Cable then ensure good quality cable.

Then add to config.txt the following
Code: Select all
max_usb_current=1
https://projects.drogon.net/testing-set ... berry-pi-b

fruitoftheloom, I'm not positive it is the power.
I was able to partition both drives and format with vfat. Its only after I rebooted the drives started looping.

The power draw on OSX USB port.

Code: Select all

Current Available (mA):	500
Current Required (mA):	2

Intel specifies 0.150 w TYP is the max power draw when Active. This is a SSD so there is nothing to spin up.
I will try "max_usb_current" after I re-image my SD card. But I dont think I need over 500mA for the drive to work.

Posted: **Wed Mar 18, 2015 12:13 pm**

Marshelj wrote:2. fdisk /dev/sda1, o, n, p, 1, d,d,d,c,w. (exits with no error).

This looks wrong, should probably be /dev/sda.
Try fdisk -l /dev/sda.

Regards
Aydan

Posted: **Wed Mar 18, 2015 2:33 pm**

"max_usb_current" Was it.

Thanks Fruitoftheloom!!

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