Query about Block Level Migration

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Operating Systems Linux Red Hat Query about Block Level Migration
# 1  
Old 01-29-2014
Query about Block Level Migration


We are planning to migrate to a new SAN storage environment. Our RHEL5.5 servers boot over SAN.

1. I was wondering if using "lvm mirroring" or "pvmove" would be a solution.
2. Do they do block level transfer?

# 2  
Old 03-02-2014

pvmove is easy to use. However, This approach can be fatal if something goes wrong.ex: You lose connectivity or did a wrong pvmove. Then, you will have to back to your backup to restore.

LV mirroring is safe option and recommended.

I remember one situation when i was supposed to choose between these two in a suddenly called data migration on one DB server. and per discussion - pvmove was choose and it only need one same size of disk and all went good untill by mistake i thought i moved data from blank disk to full disk. I was like darn.....then after 10-15 mins i realized i was looking at wrong window of mine....

Go for no hassle : lv mirroring.
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