[linux] raid question

Mark L. Chang mlchang at u.washington.edu
Wed May 7 17:21:21 PDT 2003

When you set it up initially, there isn't anything but crap on the three
drives. It has to put them into a known consistent state, and that's the
rebuild process. Looks just like when a drive horked.

It takes some time. It took just under 2 hours on my Athlon 1GHz machine
with 3x80gb 8mb cache drives at ATA-133.

On Wed, May 07, 2003 at 05:11:45PM -0700 or thereabouts, A. Mathes wrote:

> so, i set up a server this weekend using 3 hd's. It wouldn't boot off

> RAID-5 for /boot partition, so, I ended up setting up /boot as RAID-1 and

> / as RAID-5.

> It seems like everything is going well, except when I cat /proc/mdstat:


> Personalities : [raid1] [raid5]

> read_ahead 1024 sectors

> md1 : active raid1 ide/host0/bus1/target0/lun0/part1[2]

> ide/host0/bus0/target1/lun0/part1[1] ide/host0/bus0/target0/lun0/part1[0]

> 96256 blocks [2/2] [UU]

> resync=DELAYED

> md2 : active raid5 ide/host0/bus1/target0/lun0/part3[2]

> ide/host0/bus0/target1/lun0/part3[1] ide/host0/bus0/target0/lun0/part3[0]

> 236010752 blocks level 5, 32k chunk, algorithm 3 [3/3] [UUU]

> [=========>...........] resync = 47.6% (56217208/118005376)

> finish=837.0min speed=1229K/sec

> unused devices: <none>


> well, it's resyncing, to say the least. What's confusing me is I had

> thought resync happened when a drive went down. But all 3 drives are

> functional ... and I did the install to the raid itself. (mounted

> /dev/md1 and md2 before install) So nothing ever should have been out of

> sync.

> Any help as to why it's resynching or as to why it's already taken 24

> hours (and how to avoid this in the future) would be appreciated ...


> it's running gentoo


> Andrew Mathes


"Streakers *repant* your end is in sight."

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