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RN31600 and RAID1 with 5 disks
Hello all. I just bought a RN31600 and need to use it with 5 disks in RAID1 mode. However, as long as i put more than 2 disks in, the option only allows to create raid5 or raid6 with my 5 drives. I...
Creating a RAID1 on 5 HDDs is possible from SSH though.
Don't know if I should advise that, it depends on your experience in Linux systems.
I tried it on my unit and it worked:
## Switch to Flex-RAID from GUI ## Destroy the current volume from GUI (obviously, this wipes all data there is on it) # mdadm --create --verbose /dev/md127 --level=mirror --raid-devices=5 /dev/sd[a-e]3 [...] # cat /proc/mdstat Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] md127 : active raid1 sde3[4] sdd3[3] sdc3[2] sdb3[1] sda3[0] 483536832 blocks super 1.2 [5/5] [UUUUU] [>....................] resync = 1.4% (6895616/483536832) finish=114.8min speed=69136K/sec # mkfs.btrfs -L `hostid`:data /dev/md127 [...] # mount /dev/md127 /data mount: mount point /data is not a directory # ls -al /data lrwxrwxrwx 1 root root 9 Apr 18 03:50 /data -> /dev/null # rm /data # mkdir /data # mount /dev/md127 /data # mount | grep md127 [...] # df -h [...] ## Check that volume is seen from GUI ## Reboot gracefully from GUI to finalize procedure (so ReadyNAS OS mounts everything it needs,
RAID1 with 1 HDD and 4 mirrors is a perfectly valid RAID. It's just not possible on ReadyNAS...
RAID1 and RAID10 are two different things.
Agreed. Mirroring with RAID1 is perfect for me on 5 disks, and lower range ReadyNAS allow this ! (i already have a 314 which allows this on 3 disks inside + 1 disk outside.)
With RAID5 or RAID6, am I able to swap whatever drive i want from time to time .?
Again, I don't think this is a good idea, but you're master of your own property ;)
On RAID5/6, the parity is distributed, so you can indeed swap whatever HDD.
To achieve what you want, I wouldn't advise to use RAID5. Imagine you swap a drive and another drive goes bad... RAID5 has one parity, RAID6 has two.
Thank you very much for your information jak0lantash .
I will then indeed use RAID6 !
cheers
Hi,
in the first post you wrote "and bring one outside of the office", with RAID1 in teory the disk has all data of the other, but if you use RAID5/6 the disk is not useful for retrieve data.
If you need a copy of the data offsite you must search another method.
Giuseppe
Desmoquattro83 wrote:
i already have a 314 which allows this on 3 disks inside + 1 disk outside.
The R316 runs the same firmware as the RN314, so whatever you did to set it up on the 314 should work on the RN316.
Personally I think you'd be better off using rsync to back up the array to a rotating group of USB drives.
StephenB wrote:Personally I think you'd be better off using rsync to back up the array to a rotating group of USB drives.
For sure, that's a better solution.
Actually, (almost) everything is a better solution than swapping a HDD from the RAID1 itself. But op insisted :-P
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