On Fri, 18 Mar 2011, Justin Piszcz wrote:
> Hi,
>
> I can write to just about the entire USB stick, with no errors:
>
> atom:~# df -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/sda2 5.8G 1.5G 4.3G 26% /
> tmpfs 2.0G 0 2.0G 0% /lib/init/rw
> udev 10M 140K 9.9M 2% /dev
> tmpfs 2.0G 0 2.0G 0% /dev/shm
> atom:~# cd /
> atom:/# ls
> bin cdrom etc lib media nfs proc sbin srv tmp var
> boot dev home lib64 mnt opt root selinux sys usr
> atom:/# dd if=/dev/zero of=bigfile bs=1M count=4000
> 4000+0 records in
> 4000+0 records out
> 4194304000 bytes (4.2 GB) copied, 135.536 s, 30.9 MB/s
> atom:/# df -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/sda2 5.8G 5.4G 350M 95% /
> tmpfs 2.0G 0 2.0G 0% /lib/init/rw
> udev 10M 140K 9.9M 2% /dev
> tmpfs 2.0G 0 2.0G 0% /dev/shm
> atom:/# rm bigfile
>
> However, after some amount of time, the errors occur below, is this USB
> stick failing? Since it has no SMART, is there any other way to verify
> the 'health' of a USB stick?
None that I know of.
> Mar 18 07:55:12 atom [ 10.034310] e1000e 0000:03:00.0: eth1: 10/100 speed:
> disabling TSO
>
> [ .. no errors .. ]
>
> Mar 18 08:32:44 atom [ 2261.883848] usb 1-1: USB disconnect, address 2
> Mar 18 08:32:44 atom [ 2261.884465] Buffer I/O error on device sda2, logical
> block 1317256
The stick didn't "fail" in any obvious way, but for some reason it was
disconnected from the USB bus. (If it initiated that disconnect by
itself, I guess you could consider that a failure.) Maybe it was
something as simple as overheating causing a loss of electrical contact
between the connector and the pins in the USB port.
...
> Mar 18 08:33:06 atom [ 2283.963059] usb 1-1: new high speed USB device using
> ehci_hcd and address 4
> Mar 18 08:33:06 atom [ 2284.080647] usb 1-1: New USB device found,
> idVendor=0325, idProduct=ac02
> Mar 18 08:33:06 atom [ 2284.080707] usb 1-1: New USB device strings: Mfr=1,
> Product=2, SerialNumber=3
> Mar 18 08:33:06 atom [ 2284.080752] usb 1-1: Product: R2_TURBO
> Mar 18 08:33:06 atom [ 2284.080794] usb 1-1: Manufacturer: OCZ Technology
> Mar 18 08:33:06 atom [ 2284.080831] usb 1-1: SerialNumber: (removed)
And then 22 seconds later it reconnected.
Alan Stern
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