Fw: raid 4, and bitmap.

----- Original Message ----- 
From: "JaniD++" <redacted>
To: "Neil Brown" <redacted>
Sent: Friday, February 03, 2006 1:20 AM
Subject: Re: raid 4, and bitmap.

----- Original Message ----- 
From: "Neil Brown" <redacted>
To: "JaniD++" <redacted>
Cc: <redacted>
Sent: Friday, February 03, 2006 1:09 AM
Subject: Re: raid 4, and bitmap.

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On Friday February 3, djani22@dynamicweb.hu wrote:

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Hello, list, Neil,

I try to add bitmaps to raid4, and mdadm is done this fine.
In the /proc/mdstat shows this, and it is really works well.

But on reboot, the kernel drops the bitmap(, and resync the entire

array

if

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it is unclean). :(

It is still uncomplete now? (2.6.16-rc1)

It is an 'internal' bitmap, or is the bitmap in a file?

If the bitmap is in a file, you need to me sure that the file is
provided by mdadm when the array is assembled - using in-kernel
autodetect won't work.

If it is an internal bitmap.... it should work.
Are there any kernel messages during boot that might be interesting?

Sorry, i did not log this, and i dont want to restart the sync and system
for this.
Anyway, i add back the bitmap, and the next crash we will see....

I mean this was:
"bitmap is only support in raid1.
bitmap is removed."

But not so sure. :(

Cheers,
Janos

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NeilBrown