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Need help with ReadyNAS Pro rebuild
Hello, I had a previous topic on a server that had an unreliable Ethernet connection. Could reboot and it would work for awhile, then die. Seemed like hardware but it was suggested it might need a...
I also wanted to ask, is RAID 6 bulkier than RAID 5. I think I was RAID 5 before.
Not sure what you mean, by bulkier, but raid6 simply means that there is dual redundancy (you lose TWO disks worth of space, but you gain TWO disks worth of failure reliability).
raid 5 = 1 disk fails = still ok = 2 disk fails = data gone
raid6 = 2 disk fails = still ok = 3 disk fails = data gone
I personally run raid6 with any array of 6 or more disks, the extra safety margin of dual redundancy is peace of mind during rebuilds/resyncs/upgrades.
When you lose or replace disk with raid 5, there is always a chance for OTHER disk(s) to fail, and nothing sucks more than losing ALL your data during a rebuild.
besides the loss of 2 disks of space, the other 2 pitfalls means you need to minimum 4 disks to create a raid6. additionally, when you want to upgrade you must replace a minium of 4 disks (instead of replacing 2 to upgrade with raid 5).
so, raid 6 costs more in number of disks, costs more in less usable space, and costs more when you want to upgrade your space.
All that said, raid 6 is worth it for me.
How much is your data worth to you? and do you keep current backups on some other device?
because raid 5 is an accident waiting to happen.
as far as drive sizes, you should just put whichever 6 drives are the largest in the device and factory default.
that will give you the most space in the least time.
Hello, You wouldn't know it, but theoretically I have three copies of my data, unfortunately, all local. 1. I have expansions drives on my main PC, seven of them, 42TB, and then I have a SuperMicro 12 drive server with everything redundant. I just don't have it fully stocked up with drives yet, but since it is 12 bay, it can be my dumping ground for older, smaller drives. Because the NAS has been offline since July due to the Ethernet issue, I have been in a more precarious situation.
Thanks
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