Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-27 Thread Bill Davidsen
David Greaves wrote: Bill Davidsen wrote: Leon Woestenberg wrote: We will try to make disk clones first. Will dd suffice or do I need something more fancy that maybe copes with source drive read errors in a better fashion? Yes to both. dd will be fine in most cases, and I sugge

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-26 Thread Leon Woestenberg
Hello all, On 4/26/07, David Greaves <[EMAIL PROTECTED]> wrote: Bill Davidsen wrote: > Leon Woestenberg wrote: >> We will try to make disk clones first. Will dd suffice or do I need >> something more fancy that maybe copes with source drive read errors in >> a better fashion? > > Yes to both. dd

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-26 Thread David Greaves
Bill Davidsen wrote: > Leon Woestenberg wrote: >> We will try to make disk clones first. Will dd suffice or do I need >> something more fancy that maybe copes with source drive read errors in >> a better fashion? > > Yes to both. dd will be fine in most cases, and I suggest using noerror > to con

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-25 Thread Neil Brown
On Tuesday April 24, [EMAIL PROTECTED] wrote: > David, > > thanks for all the advice so far. > > On 4/24/07, David Greaves <[EMAIL PROTECTED]> wrote: > > > > Essentially all --create does is create superblocks with the data you want > > (eg > > slot numbers). It does not touch other 'on disk dat

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-25 Thread Bill Davidsen
Leon Woestenberg wrote: In first instance we were searching for ways to tell mdadm what we know about the array (through mdadm.conf) but from all advice we got we have to take the 'usual' non-syncing-recreate approach. We will try to make disk clones first. Will dd suffice or do I need something

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-24 Thread David Greaves
Leon Woestenberg wrote: > David, > > thanks for all the advice so far. No problem :) > In first instance we were searching for ways to tell mdadm what we > know about the array (through mdadm.conf) but from all advice we got > we have to take the 'usual' non-syncing-recreate approach. > > We wi

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-24 Thread Leon Woestenberg
David, thanks for all the advice so far. On 4/24/07, David Greaves <[EMAIL PROTECTED]> wrote: Leon Woestenberg wrote: > On 4/24/07, Leon Woestenberg <[EMAIL PROTECTED]> wrote: >> Hello, >> >> On 4/23/07, David Greaves <[EMAIL PROTECTED]> wrote: >> > There is some odd stuff in there: >> > >> [EM

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-24 Thread David Greaves
Leon Woestenberg wrote: > On 4/24/07, Leon Woestenberg <[EMAIL PROTECTED]> wrote: >> Hello, >> >> On 4/23/07, David Greaves <[EMAIL PROTECTED]> wrote: >> > There is some odd stuff in there: >> > >> [EMAIL PROTECTED] ~]# mdadm -v --assemble --scan >> --config=/tmp/mdadm.conf --force >> [...] >> mdad

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-24 Thread Leon Woestenberg
On 4/24/07, Leon Woestenberg <[EMAIL PROTECTED]> wrote: Hello, On 4/23/07, David Greaves <[EMAIL PROTECTED]> wrote: > There is some odd stuff in there: > [EMAIL PROTECTED] ~]# mdadm -v --assemble --scan --config=/tmp/mdadm.conf --force [...] mdadm: no uptodate device for slot 1 of /dev/md0 mdad

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-24 Thread Leon Woestenberg
Hello, On 4/23/07, David Greaves <[EMAIL PROTECTED]> wrote: There is some odd stuff in there: /dev/sda1: Active Devices : 4 Working Devices : 4 Failed Devices : 0 Events : 0.115909229 /dev/sdb1: Active Devices : 5 Working Devices : 4 Failed Devices : 1 Events : 0.115909230 /dev/sdc1: Active D

Re: Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-23 Thread David Greaves
There is some odd stuff in there: /dev/sda1: Active Devices : 4 Working Devices : 4 Failed Devices : 0 Events : 0.115909229 /dev/sdb1: Active Devices : 5 Working Devices : 4 Failed Devices : 1 Events : 0.115909230 /dev/sdc1: Active Devices : 8 Working Devices : 8 Failed Devices : 1 Events : 0.11

Multiple disk failure, but slot numbers are corrupt and preventing assembly.

2007-04-23 Thread Leon Woestenberg
Hello, it's recovery time again. Problem at hand: raid5 consisting of four partitions, each on a drive. Two disks have failed. Assembly fails because the slot numbers of the array components seem to be corrupt. /dev/md0 consisting of /dev/sd[abcd]1, of which b,c failed and of which c seems reall