[CentOS] blocks 256k chunks on RAID 1

Ross S. W. Walker rwalker at medallion.com
Tue Mar 6 15:11:44 UTC 2007

> -----Original Message-----
> From: centos-bounces at centos.org 
> [mailto:centos-bounces at centos.org] On Behalf Of 
> israel.garcia at cimex.com.cu
> Sent: Tuesday, March 06, 2007 7:50 AM
> To: centos at centos.org
> Subject: [CentOS] blocks 256k chunks on RAID 1
> Hi, I have a RAID 1 (using mdadm) on CentOS Linux and in 
> /proc/mdstat I
> see this:
> md7 : active raid1 sda2[0] sdb2[1]
> 26627648 blocks [2/2] [UU]  [-->> it's OK]
> md1 : active raid1 sdb3[1] sda3[0]
> 4192896 blocks [2/2] [UU]  [-->> it's OK]
> md2 : active raid1 sda5[0] sdb5[1]
> 4192832 blocks [2/2] [UU]  [-->> it's OK]
> md3 : active raid1 sdb6[1] sda6[0]
> 4192832 blocks [2/2] [UU]  [-->> it's OK]
> md4 : active raid1 sdb7[1] sda7[0]
> 4192832 blocks [2/2] [UU] [-->> it's OK]
> md5 : active raid0 sdb8[1] sda8[0]
> 8385536 blocks 256k chunks  [-->>>>>> What's the meaning of 
> this?  Is it
> an error on the hdds? What can I do to fix this?]

It means that md5 is a stripe set between the 4th logical
partition of sda and the 4th logical partition of sdb and
it was created using a chunk size of 256k.

Does any of that ring a bell? Do you remember creating it
and the options you used to create it?


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