Removing physical disk from RAID & LVM

Hi,

I have filesystem build up with 5 x 320 GB disks with identical partitions. Disks have 2 partitions and the first one is dedicated for RAID-1 (/dev/md0) and second one is dedicated for RAID-5 (/dev/md1). The disk /dev/md0 is mounted as /boot and the /dev/md1 is prepared for LVM. PE size is 32 MiB and there is 38035 PEs.

I am going to remove one 320 GB disk and have already reduced the sizes of existing LV:s. 1) What is the sufficient free PE number before I can imagine shrinking of RAID-5 device? 2) How should I procede after having enough free PE:s?

Hi,

I have filesystem build up with 5 x 320 GB disks with identical partitions. Disks have 2 partitions and the first one is dedicated for RAID-1 (/dev/md0) and second one is dedicated for RAID-5 (/dev/md1). The disk /dev/md0 is mounted as /boot and the /dev/md1 is prepared for LVM. PE size is 32 MiB and there is 38035 PEs.

I am going to remove one 320 GB disk and have already reduced the sizes of existing LV:s. 1) What is the sufficient free PE number before I can imagine shrinking of RAID-5 device? 2) How should I procede after having enough free PE:s?

Tero

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