On Tuesday 29 December 2009 06:27:27 am Michael Cronenworth wrote:
> Rick Wagner on 12/28/2009 09:41 PM wrote:
> > 1) Where can the errors be coming from? I would understand if a drive
> > were reporting errors. Could it be during boot, one of the R-1 members
> > is being written too before MD is started?
>
> If you have X running, you can start palimpset and view SMART data. If
> you don't have X running, you can run "devkit-disks --dump" to view
> SMART data. Look for "reallocated sectors", "uncorrectable sectors", or
> "pending sectors", and if they are not showing 0 for current value, then
> you have bad sectors forming.
>
Hi Michael,
Thanks for the suggestions. I did not find 'palimpset', but used the your
'devkit' suggestion. Looking at the physical device entries (i.e. 'sd[abc]
[1234]?') did not show anything like error counts. I take that to mean there
are no errors to be reported, though an affirmative entry of "no errors"
errors would be more reassuring. These are fairly modern drives, so I would
expect that SMART would be supported on them, but wonder a little seeing the
entry: "ATA SMART: not available".
Looking forward at other replies: I scanned the logs for interesting messages
on sd[abc], not specifically for medium errors. I expected that I had smartd
running, but your later reply inspired me to verify, and I found it was not.
Thanks for the reminder on that.
Below is a sample of the "devkit-disks --dump" for one of the physical
devices, with the "not available" for the "ATA SMART" entry:
Other replies also imply that this is common if you have swap or mmaped files
on the MD. swap is on separate partitions, but I suppose the system or
service may have some mmaped files (this is the root partition).
Thanks for the suggestions,
--rick
========================================================================
Showing information for /org/freedesktop/DeviceKit/Disks/devices/sda
native-path:
/sys/devices/pci0000:00/0000:00:05.0/host0/target0:0:0/0:0:0:0/block/sda
device: 8:0
device-file: /dev/sda
by-id: /dev/disk/by-id/ata-WDC_WD1001FALS-00J7B0_WD-
WMATV0665717
by-id: /dev/disk/by-id/scsi-SATA_WDC_WD1001FALS-_WD-
WMATV0665717
by-path: /dev/disk/by-path/pci-0000:00:05.0-scsi-0:0:0:0
detected at: Tue 29 Dec 2009 11:17:52 AM PST
system internal: 1
removable: 0
has media: 1 (detected at Tue 29 Dec 2009 11:17:52 AM PST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation name:
presentation icon:
size: 1000204886016
block size: 512
job underway: no
usage:
type:
version:
uuid:
label:
partition table:
scheme: mbr
count: 4
drive:
vendor: ATA
model: WDC WD1001FALS-0
revision: 05.0
serial: WD-WMATV0665717
ejectable: 0
require eject: 0
media:
compat:
interface: ata
if speed: (unknown)
ATA SMART: not available
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