On Wed, 12 Jan 2011, compdoc wrote:
> To: 'CentOS mailing list' <centos@xxxxxxxxxx>
> From: compdoc <compdoc@xxxxxxxxxxxx>
> Subject: Re: Kernel Errors Present
>
> Bad sectors get reallocated automatically, so you might
> not find any with testing. You need to see how many have
> been reallocated.
Vivard disk diagnostic tool lists any sector read
erros, and a count of remapped sectors, if there are any
remapped.
> SMART should already be enabled, so maximize your term
> window and type:
>
> smartctl -a /dev/sdb
>
> That will show the reallocated sector count, as well as
> power on hours, and temps, etc. Do that for each drive.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE
UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 200 200 051
Pre-fail Always - 0
3 Spin_Up_Time 0x0007 093 090 021
Pre-fail Always - 2741
4 Start_Stop_Count 0x0032 099 099 040
Old_age Always - 1611
5 Reallocated_Sector_Ct 0x0033 200 200 140
Pre-fail Always - 0
7 Seek_Error_Rate 0x000b 200 200 051
Pre-fail Always - 0
No re-allocated sectors found.
> If its attached to a raid controller, you have to take
> additional steps as found on google.
No it's a standard IDE controller.
Looking in /proc/ide/ide2/hde/settings I find this:
name value min max
mode
---- ----- --- ---
----
pio_mode write-only 0 255
w
using_dma 1 0 1
rw
wcache 1 0 1
rw
I have tried to turn DMA off for this drive, using the
libata.dma=0 kernel boot parameter.
But it's still coming up as using_dma 1.
If I can turn DMA off for this drive, that might get rid of
the DMA error messages.
hde: dma_intr: error=0x84 { DriveStat ...: 12 Time(s)
hde: dma_intr: status=0x51 { DriveReady SeekComplete
Kind Regards,
Keith Roberts
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