> -----Original Message-----
> From: Micah Anderson [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, September 06, 2000 8:54 AM
> To: [EMAIL PROTECTED]
> Subject: Data loss with overlapping physical units?
>
> I got a couple of messages in my dmesg as follows:
> md: serializing resync, md4 has overlapping physical units with md5!
>
> What I dont understand is that their isn't any physical
> overlap, according
> to fdisk:
>
> /dev/sdb8 599 1084 3903763+ fd Linux raid
> autodetect
> /dev/sdb9 1085 2232 9221278+ fd Linux raid
> autodetect
>
> sdb8 is part of md4 and sdb9 is part of md5, sure the ending
> of sdb8 is one
> away from the beginning of sdb9, but will this be a problem?
Mucho confusing error message. A physical unit (in that message) means
DISK, not BLOCK. Since you've got multiple RAID arrays on the same disk, it
serializes things to avoid thrashing the disk. Resync'ing both arrays at
the same time would probably make it take about 10 times as long, as seeking
across the disk is VERY slow. Yeah, this is going in the FAQ, very soon.
Later,
Greg
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