* mapping of md device blocks to component blocks? (and vice versa)
@ 2004-12-10 14:45 Leon Woestenberg
2004-12-20 18:51 ` Leon Woestenberg
0 siblings, 1 reply; 3+ messages in thread
From: Leon Woestenberg @ 2004-12-10 14:45 UTC (permalink / raw)
To: Linux RAID Mailing List
Hello,
given the LBA (bad) block of a disk drive, or the block number of
a partition, how can I tell which block on the /dev/md? device
corresponds with it?
Also, vice versa, given a block number on the /dev/md device, how
can I tell to which blocks it maps on the components?
Regards,
Leon.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: mapping of md device blocks to component blocks? (and vice versa)
2004-12-10 14:45 mapping of md device blocks to component blocks? (and vice versa) Leon Woestenberg
@ 2004-12-20 18:51 ` Leon Woestenberg
2004-12-20 22:24 ` Neil Brown
0 siblings, 1 reply; 3+ messages in thread
From: Leon Woestenberg @ 2004-12-20 18:51 UTC (permalink / raw)
To: Linux RAID Mailing List
Hello,
I would like to re-issue my earlier question:
Given the LBA (bad) block number of a disk drive, or the block number
of a partition, how can I tell which block on the /dev/mdX device
corresponds with it?
Or should I ask this elsewhere?
Regards,
Leon.
Leon Woestenberg wrote:
>Hello,
>
>given the LBA (bad) block of a disk drive, or the block number of
>a partition, how can I tell which block on the /dev/md? device
>corresponds with it?
>
>Also, vice versa, given a block number on the /dev/md device, how
>can I tell to which blocks it maps on the components?
>
>Regards,
>
>Leon.
>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: mapping of md device blocks to component blocks? (and vice versa)
2004-12-20 18:51 ` Leon Woestenberg
@ 2004-12-20 22:24 ` Neil Brown
0 siblings, 0 replies; 3+ messages in thread
From: Neil Brown @ 2004-12-20 22:24 UTC (permalink / raw)
To: Leon Woestenberg; +Cc: Linux RAID Mailing List
On Monday December 20, leonw@mailcan.com wrote:
> Hello,
>
> I would like to re-issue my earlier question:
>
> Given the LBA (bad) block number of a disk drive, or the block number
> of a partition, how can I tell which block on the /dev/mdX device
> corresponds with it?
There is no easy answer.
You need to understand the layout of the array, and do some
arithmetic.
NeilBrown
^ permalink raw reply [flat|nested] 3+ messages in thread
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2004-12-10 14:45 mapping of md device blocks to component blocks? (and vice versa) Leon Woestenberg
2004-12-20 18:51 ` Leon Woestenberg
2004-12-20 22:24 ` Neil Brown
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