Will you suggest to use FATA disk and fibre disk to form a Linux volumn group

[James Leong]

Dear All,

I am using EVA3000 under HP maintenance contract, 1 month ago I asked if it is ok to use FATA and FC disks to form a linux volomn group. But the reply is not suggested to use these two types of disk to form a disk group. I hope to make sure that the disk group is EVA disk group or Linux disk volume group. If it is the later, what will HP suggest?

[Alzhy · Accepted solution]

Bad idea, Not Suggested at all - but YOU can - if you know what you're doing.

FC drives are designed to be higher performing and "on-line" type disks and 24x7 duty.

FATA Drives are designed to be near-online, lower performing and non-full duty disks. Create VOlumes/Filesystem on them that will be light duty -- i.e. posibly as an Oracle Export filesystem, or RMAN to disk destination, backup disk, etc. Usage that will only involve the volume/filesystem for a few minutes to a few hours a day.

If you create volume groups whose components are a mix - make sure you properly identify and build your file systems so they do not span from FC to FATA or vice versa.

For instance:

Say you have Volume Group named eva300vg with 4 physical volumes - /dev/sdva to /dev/sdvd with /dev/sdvd as a FATA based LUN or Vdisk. Make sure when you create LVOL that you specify your physical volume when creating so you don't have spanning among FATA and FC