RAID1 problem - server freezes on md data-check

[George Chelidze <wrath@geo.net.ge>]

Hello,

I'v got an HP ML110 Intel Dual-Core E2160 server with 2 HDDs:

GB0250EAFYK - HP 250GB 3G SATA 7.2K 3.5" MDL 250 GB SATA Hard Drive
GB0250C8045 - HP 250GB 7.2K SATA Hard Disk Drive

So, I use SATA 3.0-Gb/s and SATA 1.5 Gb/s for RAID-1 configuration. I
have configured 4 MD volumes and it's running fine for some time,
however every now and then servers freezes. At that time I can ping the
server from the network, however I can't ssh into the server, even a
keyboard us useless, so I have to hard reset the server. Below are the
last messages from my kern.log:

Jan  3 00:57:01 barambo1 kernel: [986475.159596] md: data-check of RAID
array md0
Jan  3 00:57:01 barambo1 kernel: [986475.159600] md: minimum
_guaranteed_  speed: 1000 KB/sec/disk.
Jan  3 00:57:01 barambo1 kernel: [986475.159602] md: using maximum
available idle IO bandwidth (but not more than 200000 KB/sec) for
data-check.
Jan  3 00:57:01 barambo1 kernel: [986475.159606] md: using 128k window,
over a total of 3903680 blocks.
Jan  3 00:57:01 barambo1 kernel: [986475.162041] md: delaying data-check
of md1 until md0 has finished (they share one or more physical units)
Jan  3 00:57:01 barambo1 kernel: [986475.164449] md: delaying data-check
of md2 until md0 has finished (they share one or more physical units)
Jan  3 00:57:01 barambo1 kernel: [986475.164455] md: delaying data-check
of md1 until md2 has finished (they share one or more physical units)
Jan  3 00:57:01 barambo1 kernel: [986475.166695] md: delaying data-check
of md3 until md0 has finished (they share one or more physical units)
Jan  3 00:57:01 barambo1 kernel: [986475.166699] md: delaying data-check
of md1 until md3 has finished (they share one or more physical units)
Jan  3 00:57:01 barambo1 kernel: [986475.166705] md: delaying data-check
of md2 until md3 has finished (they share one or more physical units)
Jan  3 00:58:13 barambo1 kernel: [986547.257883] md: md0: data-check
done.
Jan  3 00:58:13 barambo1 kernel: [986547.276663] md: delaying data-check
of md1 until md3 has finished (they share one or more physical units)
Jan  3 00:58:13 barambo1 kernel: [986547.276668] md: data-check of RAID
array md3
Jan  3 00:58:13 barambo1 kernel: [986547.276671] md: minimum
_guaranteed_  speed: 1000 KB/sec/disk.
Jan  3 00:58:13 barambo1 kernel: [986547.276674] md: using maximum
available idle IO bandwidth (but not more than 200000 KB/sec) for
data-check.
Jan  3 00:58:13 barambo1 kernel: [986547.276678] md: using 128k window,
over a total of 122126016 blocks.
Jan  3 00:58:13 barambo1 kernel: [986547.276681] md: delaying data-check
of md2 until md3 has finished (they share one or more physical units)

OS is Debian 5.0.3 Lenny stable with linux-image-2.6.30-bpo.2-686
kernel. I had the same results with linux-image-2.6.26-2-686 stock
kernel. My basic question is can this happen because I use 2 different
drives? I have a chance to replace GB0250C8045 with GB0250EAFYK or
GB0250EAFYK with GB0250C8045 and have 2 identical drives. Is it a good
idea and will it solve my problem?

Thank you in advance for any input,

Best Regards,

George Chelidze