Hard Drive disconnects after a random interval of time

[firelice]

I'm new to Raspberry Pi and Linux so I might just be stupid.
So I have a ntfs 4tb Western Digital External hard drive that is externally powered so power is not coming from the RPi. I have the raspberry pi connected with a 2.5a power supply. I have the raspberry pi running rasbian, samba, and deluge (I have ntfs-3g installed). The problem is that randomly it just disconnects and won't let me mount the hard drive back it gives the error.

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pi@raspberrypi ~ $ sudo mount /dev/sda1 /media/USBHDD1
mount: special device /dev/sda1 does not exist

When I type dmesg it gives this mess (its a much longer list)

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[ 3353.559398] Buffer I/O error on dev sda1, logical block 786431, async page read

Rebooting the raspberry pi and running deluge seems to work for a little bit, but it will come back with the I/O error after a random interval in time from a couple of minutes to a few weeks.
If you need more information I can provide it.

[hennesski]

hello,

I'm searching for an answer to this question as well. I see nobody has posted any ideas.

Yes, for me as well, I have a 2tb hard drive, in a hard drive enclosure (3.5") and I can connect and mount and access the drive, but then randomly, sometimes 2 minutes sometimes 10 minutes, it'll disconnect and I have to, like, power everything down and power it back on for it to work again.

Anyway, just wondering if there is hard drive enclosures that cause the issue, that if there are real people who have verified that certain hard drive enclosures work properly with the RPi, etc etc.

just wondering what the thoughts of the pro's might be. ...