RE: Recovery raid5 after sata cable failure.

["Francisco Zafra" <fzafra@gmail.com>]

Hi, I am using lvm in this system, but only for parallel ATA disks, that not
use raid system. Anyway I deactivated lvm units, and tried again to readd de
faulty drive with the same results:

root@Torero-2:~ # mdadm /dev/md0 -a /dev/sdh1  
mdadm: Cannot open /dev/sdh1: Device or resource busy

Thanks,
Paco.

> -----Mensaje original-----
> De: Jim Radford [mailto:jradford@npl.com] 
> Enviado el: domingo, 17 de julio de 2005 14:21
> Para: Francisco Zafra
> Asunto: Re: Recovery raid5 after sata cable failure.
> 
> Francisco,
> 
> I was having a simuliar issue, and it was due to the fact LVM 
> was starting before the raid array was assembled, if you are 
> using LVM you might want to check that the array is assembled 
> before LVM starts. (Probably would be the same for EVMS also).
> 
> Regards,
> Jim
> 
> 
> On Sun, 17 Jul 2005, Francisco Zafra wrote:
> 
> > Hi all,
> >
> >    I have raid5 array working without problem for some 
> months. A SATA 
> > cable failed and de raid5 works fine keeping the superblock 
> > persistent, but now, I can't get the old device inserted 
> into the array.
> >    This is the array just now:
> >
> > root@Torero-2:/mnt/raid5 # mdadm --detail /dev/md0
> > /dev/md0:
> >        Version : 00.90.01
> >  Creation Time : Tue May 31 19:37:37 2005
> >     Raid Level : raid5
> >     Array Size : 1367507456 (1304.16 GiB 1400.33 GB)
> >    Device Size : 195358208 (186.31 GiB 200.05 GB)
> >   Raid Devices : 8
> >  Total Devices : 7
> > Preferred Minor : 0
> >    Persistence : Superblock is persistent
> >
> >    Update Time : Sun Jul 17 13:06:17 2005
> >          State : clean, degraded
> > Active Devices : 7
> > Working Devices : 7
> > Failed Devices : 0
> >  Spare Devices : 0
> >
> >         Layout : left-symmetric
> >     Chunk Size : 512K
> >
> >           UUID : c4ed8e45:2a036953:92bff479:7cf5bac9
> >         Events : 0.162797
> >
> >    Number   Major   Minor   RaidDevice State
> >       0       8        1        0      active sync   /dev/sda1
> >       1       8       17        1      active sync   /dev/sdb1
> >       2       8       33        2      active sync   /dev/sdc1
> >       3       8       49        3      active sync   /dev/sdd1
> >       4       8       65        4      active sync   /dev/sde1
> >       5       8       81        5      active sync   /dev/sdf1
> >       6       8       97        6      active sync   /dev/sdg1
> >       7       0        0        -      removed
> >
> >
> > 	And I try to re-add the old disk in this way:
> >
> > root@Torero-2:/mnt/raid5 # mdadm /dev/md0 -a /dev/sdh1
> > mdadm: Cannot open /dev/sdh1: Device or resource busy
> >
> > 	What is wrong? What I am doing bad? Sdh1 is absolutely 
> unused, so I 
> > don't understand the error "resource busy"
> >
> > 	Thanks,
> >
> > 	Paco Zafra.
> >
> > -
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> >
> 
> --
> ==============================================================
> ============
> Jim Radford <jradford@npl.com>
> http://www.jimradford.com/
> ==============================================================
> ============
>