[ale] RAID Fun

[Jeff Hubbs]

But if you do that, your box is in trouble if you lose one of the drives
that has one of those swap partitions on it.  Putting swap on RAID makes
perfect sense if you want a machine to run uninterrupted if a drive
fails.

- Jeff

On Sat, 2003-08-16 at 22:19, Drag0n wrote:
> Not too bad, 
> But having swap as mdraid is unneeded, if you ser the pri=1 for 2 swap
> partitions in fstab options, swapon uses them in parallel with no raid
> overhead. In fact, most raid how-to's recomend this over raid.
> 
> Drag0n
> dragon at atlantacon.org
> 
> On Sat, 2003-08-16 at 19:09, Robert L. Harris wrote:
> > {0}:/home/nomad>mount
> > /dev/md/0 on / type ext3 (rw)
> > /dev/md/1 on /home type ext3 (rw)
> > /dev/md/2 on /mnt/data1 type ext3 (rw)
> > proc on /proc type proc (rw)
> > devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> > 
> > md0 and 1 are mirrors, md2 is raid5 and the box even has it's swapfile
> > on a mirror (md3)...
> > 
> > 
> > {0}:/home/nomad>cat /proc/mdstat
> > Personalities : [raid1] [raid5]
> > read_ahead 1024 sectors
> > md3 : active raid1 ide/host0/bus0/target0/lun0/part2[2]
> > ide/host0/bus0/target1/lun0/part2[0]
> >       3911744 blocks [2/1] [UU]
> > 
> > md0 : active raid1 ide/host0/bus0/target0/lun0/part1[2]
> > ide/host0/bus0/target1/lun0/part1[0]
> >       1875292 blocks [2/1] [UU]
> > 
> > md1 : active raid1 ide/host0/bus0/target0/lun0/part3[2]
> > ide/host0/bus0/target1/lun0/part3[0]
> >       29156996 blocks [2/1] [UU]
> > 
> > md2 : active raid5 scsi/host0/bus0/target3/lun0/part1[3]
> > scsi/host0/bus0/target2/lun0/part1[2]
> > scsi/host0/bus0/target1/lun0/part1[1]
> > scsi/host0/bus0/target0/lun0/part1[0]
> >       215043072 blocks level 5, 1024k chunk, algorithm 2 [4/4] [UUUU]
> >       [===>.................]  resync = 16.4% (11764684/71681024)
> > finish=109.8min speed=9086K/sec
> > unused devices: <none>
> > 
> > 
> > 
> > :wq!
> > ---------------------------------------------------------------------------
> > Robert L. Harris                     | GPG Key ID: E344DA3B
> >                                          @ x-hkp://pgp.mit.edu
> > DISCLAIMER:
> >       These are MY OPINIONS ALONE.  I speak for no-one else.
> > 
> > Life is not a destination, it's a journey.
> >   Microsoft produces 15 car pileups on the highway.
> >     Don't stop traffic to stand and gawk at the tragedy.
-- 
Jeff Hubbs <hbbs at comcast.net>

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