[SunHELP] Do you need to break the mirror when replacing a ba d hard drive ?

[Low, Adam]

I believe its a minimum of two metadb's required to keep the machine running and as most of the time you would put two per drive this shouldnt be an issue.

If you have the minimum you should be able to de-attach the second meta device and remove it from the chassis (depending on hardware support for hot swap). Although from my experience this has always resulted in something screwing up and me losing the machine, dont let that put you off though its probaly just my fat fingers.

Cheers,
Adam

> -----Original Message-----
> From: ed at the7thbeer.com [mailto:ed at the7thbeer.com]
> Sent: 04 July 2001 00:16
> To: sunhelp at sunhelp.org
> Subject: Re: [SunHELP] Do you need to break the mirror when 
> replacing a
> bad hard drive ?
> 
> 
> With half the metadb's bad, won't the box refuse to boot(I thought it
> needed 50% + 1 to boot)?  
> 
> ===============================
> Ed Mitchell (ed<-at->the7thbeer.com)
> Finger for PGP public key
> ===============================
> This boxen's uptime stats....
>   3:14pm  up 24 day(s),  4:22,  2 users,  load average: 0.02, 
> 0.01, 0.02
> 
> 
> On Tue, 3 Jul 2001 ymui at royalsunalliance.ca wrote:
> 
> > Hello Administrators,
> > 
> > We have RADI 1 (mirror) set up by DiskSuite on the boot 
> disk.  There is a
> > hardware error on the alternate disk and Metastat shows :
> > 
> > d2: Submirror of d0
> >     State: Needs maintenance
> >     Invoke: metareplace d0 c0t1d0s0 <new device>
> > 
> > Metadb -i :
> >        flags           first blk       block count
> >      a m  p  luo        16              1034            
> /dev/dsk/c0t0d0s3
> >      a    p  luo        1050            1034            
> /dev/dsk/c0t0d0s3
> >      a    p  luo        2084            1034            
> /dev/dsk/c0t0d0s3
> >       W   p  l          16              1034            
> /dev/dsk/c0t1d0s3
> >       W   p  l          1050            1034            
> /dev/dsk/c0t1d0s3
> >       W   p  l          2084            1034            
> /dev/dsk/c0t1d0s3
> > 
> > There are only 2 slices and the other slice (swap 
> partition) is fine.
> > 
> > Before replacing the problem hard disk which requires a 
> reboot (as these
> > are internal disks) do you need to break the mirror first ? 
>  Or, just shut
> > down the system, replace the hard disk, boot, partition and 
> recreate the
> > metadb on the new drive and synchronise the mirror ?
> > 
> > Much appreciated.
> > 
> > Yingha.
> > 
> > _______________________________________________
> > SunHELP maillist  -  SunHELP at sunhelp.org
> > http://www.sunhelp.org/mailman/listinfo/sunhelp
> > 
> 
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