Force RAID1 as clean

Force RAID1 as clean

[Måns Rullgård]

Is there a way to forcibly mark a RAID1 as clean?  I know it can be
dangerous, I just don't want to wait for 200GB of scrap to resync.

For some reason, the resync is terribly slow in Linux 2.6.0, only
~1MB/s.  DMA is enabled on all disks and the individual performance of
each disk is normal.  There are no error messages from the kernel.  It
just doesn't seem right.

-- 
Måns Rullgård
mru@kth.se

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Re: Force RAID1 as clean

[Matthew Simpson]

2.4.18 here and I'm also getting about 1MBs/sec on resynch.  :(

----- Original Message ----- 
From: "Måns Rullgård" <mru@kth.se>
To: <linux-raid@vger.kernel.org>
Sent: Monday, January 05, 2004 8:13 PM
Subject: Force RAID1 as clean


>
> Is there a way to forcibly mark a RAID1 as clean?  I know it can be
> dangerous, I just don't want to wait for 200GB of scrap to resync.
>
> For some reason, the resync is terribly slow in Linux 2.6.0, only
> ~1MB/s.  DMA is enabled on all disks and the individual performance of
> each disk is normal.  There are no error messages from the kernel.  It
> just doesn't seem right.
>
> -- 
> Måns Rullgård
> mru@kth.se
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

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Re: Force RAID1 as clean

[Thomas Steudten]

Hi

Do you increment the values in /proc/sys/dev/raid?
(Hope it´s still there in 2.6.x)

Matthew Simpson wrote:

> 2.4.18 here and I'm also getting about 1MBs/sec on resynch.  :(

>>For some reason, the resync is terribly slow in Linux 2.6.0, only
>>~1MB/s.  DMA is enabled on all disks and the individual performance of
>>each disk is normal.  There are no error messages from the kernel.  It
>>just doesn't seem right.


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Re: Force RAID1 as clean

[Måns Rullgård]

Thomas Steudten <alpha@steudten.com> writes:

> Matthew Simpson wrote:
>
>>>For some reason, the resync is terribly slow in Linux 2.6.0, only
>>>~1MB/s.  DMA is enabled on all disks and the individual performance of
>>>each disk is normal.  There are no error messages from the kernel.  It
>>>just doesn't seem right.
>>
>> 2.4.18 here and I'm also getting about 1MBs/sec on resynch.  :(
>
> Do you increment the values in /proc/sys/dev/raid?
> (Hope it's still there in 2.6.x)

I did, and the problem went away.  Now it's 40 MB/s.

-- 
Måns Rullgård
mru@kth.se
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