Re: RAID 5 performance problems

[Jonathan Vardy]

you're right, it should be. When I was writing the original mail I had it
running in degraded mode so I edited the values that /proc/mdstat gave me to
match the array in normal mode. I forgot to make [_UUUU]  [UUUUU]. I'm
currently rebuilding the array but it's taking some time...

md0 : active raid5 hdc1[5] hdk1[4] hdi1[3] hdg1[2] hde1[1]
      468872704 blocks level 5, 128k chunk, algorithm 0 [5/4] [_UUUU]
      [================>....]  recovery = 83.1% (97429504/117218176)
finish=65.5min speed=5034K/sec

----- Original Message -----
From: "Andy Arvai" <[e-mail]>
To: <[e-mail]>
Cc: <[e-mail]>
Sent: Thursday, April 03, 2003 9:49 PM
Subject: Re: RAID 5 performance problems

>
> Shouldn't /proc/mdstat have [UUUUU] instead of [_UUUU]? Perhaps
> this is running in degraded mode. Also, you have 'algorithm 0',
> whereas my raid5 has 'algorithm 2', which is the left-symmetric
> parity algorithm.
>
> Andy
>
> > cat /proc/mdstat gives:
> >
> > Personalities : [raid0] [raid5]
> > read_ahead 1024 sectors
> > md0 : active raid5 hdk1[4] hdi1[3] hdg1[2] hde1[1] hdc1[0]
> > 468872704 blocks level 5, 128k chunk, algorithm 0 [5/5] [_UUUU]
> > unused devices: <none>
>
>
>
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