On Sun, May 4, 2008 at 2:33 PM, Greg Freemyer <greg.freemyer@xxxxxxxxx> wrote:
> On Sat, May 3, 2008 at 4:29 AM, Taisuke Yamada <tai@xxxxxxxxxxxx> wrote:
> > Hi.
> >
> > I recently bought 3 HGST P7K500-series 500GB SATA drives and
> > had trouble accessing the block right on the LBA28-LBA48 border.
> > Here's how it fails (same for all 3 drives):
> >
> > # dd if=/dev/sdc bs=512 count=1 skip=268435455 > /dev/null
> > dd: reading `/dev/sdc': Input/output error
> > 0+0 records in
> > 0+0 records out
> > 0 bytes (0 B) copied, 0.288033 seconds, 0.0 kB/s
> > # dmesg
> > ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > ata1.00: BMDMA stat 0x25
> > ata1.00: cmd c8/00:08:f8:ff:ff/00:00:00:00:00/ef tag 0 dma 4096 in
> > res 51/04:08:f8:ff:ff/00:00:00:00:00/ef Emask 0x1 (device error)
> > ata1.00: status: { DRDY ERR }
> > ata1.00: error: { ABRT }
> > ata1.00: configured for UDMA/33
> > ata1: EH complete
> > ...
>
> I'm surprised to see the above. We do lots of dd to raw SATA drive
> activity with a large variety of drives. Both reads and writes and
> we've never noticed this issue.
>
> Does it happen if you are using 4k blocks with dd?
>
> ie. We typically read / write the entire drive but using 4k blocks.
>
> In fact a few months ago we specifically bought about 15 drives of
> various sizes and manufacturers and verified that we could both read
> and write all of the sectors of the drives.
>
Taisuke,
I'd like to reproduce your results and keep the drive as a test drive
to ensure our systems work properly across the entire spectrum of
drives.
>From our earlier tests we had a Hitachi 7K1000 Series Model
HDS721075KLA330 SATA 750GB drive, but it is not exhibiting the problem
you describe.
Can you tell me a specific Model number Hitachi drive that the current
linux kernel is failing with.
Thanks
Greg
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