Re: RaidFrame and multiple arrays on same disks
From: raphael mazelier (raf_at_ztrip.ath.cx)
Date: 05/25/05
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Date: Wed, 25 May 2005 20:28:20 +0200
Yes it is possible;
Take a look to my configuration (It's a netbsd box but It works the same
manner).
I have 4 disks splitted in 3 raid5 array. (note: that's really not a
good setting for perf).
This is not exactly what you but you can easily adapt to what you want.
Anyway there are my conf files :
1 . disklabel for my 4 disks :
# /dev/rwd0d: (first disk , but all are identicals)
type: ESDI
disk: ESDI/IDE disk
label: IBM0 #(name each disk to avoid confusion)
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 16383
total sectors: 241254720
rpm: 7200
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # microseconds
track-to-track seek: 0 # microseconds
drivedata: 0
16 partitions:
# size offset fstype [fsize bsize cpg/sgs]
c: 241250000 63 unused 0 0
e: 80416666 63 RAID
f: 80416666 80416729 RAID
g: 80416666 160833395 RAID
2. raid0.conf :
START array
# numRow numCol numSpare
1 4 0
START disks
/dev/wd0e
/dev/wd1e
/dev/wd2e
/dev/wd3e
START layout
# sectPerSU SUsPerParityUnit SUsPerReconUnit RAID_level_5
32 1 1 5
START queue
fifo 100
3. raid1.conf :
START array
# numRow numCol numSpare
1 4 0
START disks
/dev/wd0f
/dev/wd1f
/dev/wd2f
/dev/wd3f
START layout
# sectPerSU SUsPerParityUnit SUsPerReconUnit RAID_level_5
32 1 1 5
START queue
fifo 100
etc...
-- raf transpetaflops wrote: > Hi. > > I've been reading the man-pages for raid and raidctl but can't seem to find > any info about the following scenario. If I have 4 identical disks, would it > be possible to create the following configuration with RaidFrame? > > Array 1 - RAID1 > 50% of disk 1 > 50% of disk 2 > > Array 2 - RAID1 > 50% of disk 3 > 50% of disk 4 > > Array 3 - RAID5 > Remaining 50% of disks 1, 2, 3 and 4 > > How would the config files look to accomplish this? Should I create 2 > disklabels on each disk or could I define in the config that only part of > the disklabel should be used for a certain array? > > An extra bonus would be if I could stripe the two RAID1-arrays thus creating > one RAID10. > > Regards > PP > > >
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