Quick hdd raid question

cosmicgate

hi guys, with the SSd price drastically dropping in tge last couple months I've since upgraded all my pc drives to SSd and now I'm left with 3 old drives: a 320gb, 500gb and 1tb hdd. Can I run these drives with different capacity on raid 5?if yes, Are there any good online tutorials out there that you can point me to?Thanks

Randy

Get Ranty to help you ;-)

cosmicgate

No thanks, Randy will just tell everyone what porn I have on those drives

NickM

With a standard RAID 5, you'll be limited by the size of the smallest drive.

cosmicgate

@nickM . In this case , I only have a disk space of 320gb if I raid those 3 drives?

MikHo

Yes

NickM

It'll be 640GB if you use RAID5.

Kenshin

/dev/md0 - RAID 5 - 320GB x 3 - Usable 640GB /dev/md1 - RAID 1 - Remainder 180gb (500GB - 320GB) - Usable 180GB /dev/sdc4 - No RAID - Remainder 500gb (1TB - 500GB) - Usable 500GB

Total available 1.32TB, 820GB raid protected data can withstand any 1 disk to fail. Important porn you cannot afford to lose in /dev/md0 or /dev/md1, porn you can afford to lose /dev/sdc4.

Alternately I'd probably do this to avoid the RAID5 XOR since the raid protected capacity is the same but you lose non raid capacity.

/dev/md0 - RAID 1 - 320GB + 320GB (from 1TB) - Usable 320GB /dev/md1 - RAID 1 - 500GB + 500GB (from 1TB) - Usable 500GB /dev/sdc4 - No Raid - 180GB (from 1TB) - Usable 180GB

gsrdgrdghd

I think Btrfs allows you to put drives with different sizes together and have some level of redundancy at the same time