From: Miles Fidelman on
Gregory Seidman wrote:
> # hdparm -i /dev/sda
> HDIO_GET_IDENTITY failed: Invalid argument
>
> /dev/sda:
>
> # hdparm -i /dev/sdb
> HDIO_GET_IDENTITY failed: Invalid argument
>
>
You might try "lusb" - to list devices on your usb bus. That might help
you identify specific devices.

Also try nosing around in the sub-directories under /dev/disk

And, perhaps an obvious question, but does the drive maker provide any
device-specific drivers or utilities that might help?


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In<fnord> practice, there is. .... Yogi Berra



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From: Paul Cartwright on
On Thu July 22 2010, Miles Fidelman wrote:
> You might try "lusb" - to list devices on your usb bus.  That might help
> you identify specific devices.

I think you meant lsusb ..

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Paul Cartwright
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From: Stan Hoeppner on
Gregory Seidman put forth on 7/22/2010 9:45 AM:

> Nope, it's a tower:
> ThinkCentre M52 3.2GHz Intel Pentium IV Desktop PC

> The tower was purchased refurbished, but is probably circa 2004. The
> drives, cables, and enclosures are no more than two years old.

Both external drives are native SATA correct? I think your best course of
action at this point would be to purchase a $15-20 two port PCI SATA card
based on a SiI 3512 chipset, any internal SATA data/power cables you'd need,
and move the drives inside the PC. This will allow smartmontools, hdparm, and
other utils to identify the drives, and you'll likely get a nice speed boost
as well, especially if that PC has a 66MHz 32bit PCI slot, which will allow
full bandwidth to both drives simultaneously.

Newegg has everything you need. I recommend the Koutech 3512 based card. I
have one in my server and it works very well. I gave $15 for it but I think
it's up to $20 now, which is still very reasonable. You should be able to
pick up the Koutech, 2 x 3.5" to 5.25" generic drive bay adapters if you need
them, and 2 combo SATA data/power cables for $30-40 including shipping.

If that PC has motherboard down SATA ports you're in business with no cash
outlay, assuming you have SATA data/power cables.

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Stan


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From: Miles Fidelman on
Paul Cartwright wrote:
> On Thu July 22 2010, Miles Fidelman wrote:
>
>> You might try "lusb" - to list devices on your usb bus. That might help
>> you identify specific devices.
>>
> I think you meant lsusb ..
>
>
yup - oops... sorry about that

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From: Camaleón on
On Thu, 22 Jul 2010 07:38:02 -0400, Gregory Seidman wrote:

> I have a RAID1 (using md) running on two USB disks. (I'm working on
> moving to eSATA, but it's USB for now.) That means I don't have any
> insight using SMART. Meanwhile, I've been getting occasional fail
> events. Unfortunately, I don't get any information on which disk is
> failing.

(...)

"cat /proc/mdstat" should tell what device is failing.

Also, take a look into "/var/log/syslog" and search for error messages
about the failed disk.

Greetings,

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Camaleón


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