JBOD vs regular HDD vs RAID

The disk is formatted differently, but the odds of a JBOD disk failing should be similar to a failing HDD in a PC. XRAID-2 is more reliable, but even with RAID you need a backup.

Keep in mind, the readynas does not support generic 'jbod'.

It does support 'flex-raid' modes such as individual single disk raid-0 volumes, however there is currrently a 4 volume limit, so if you had a 6bay or bigger device you would need to have different mixed raid modes to utilize all disks.

Further, the readynas is not designed for adhoc adding/remove drives (ie insert a new drive, copy data from 1 volume to another, then remove one of the disks). Any disk added to the device will lose any previous data and be formatted/initialized as a new disk.

With the NV+ v2, the Flex-RAID JBOD option is the individual single disk raid-0 volumes option.

thanks for the replies, i feel better now.

just to be clear,
if i add a new disk, then it WILL be formatted and all data will be lost, right?
if i remove an existing disk and then re-insert it, NO formatting takes place, all data is ok, right?
does it matter if i move one existing disk to another bay, from 1 to 3, for example?

liquidmonkey wrote:
if i add a new disk, then it WILL be formatted and all data will be lost, right?

Yes the disk you add will be wiped.

liquidmonkey wrote:
if i remove an existing disk and then re-insert it, NO formatting takes place, all data is ok, right?

Wrong. The disk would be wiped.

liquidmonkey wrote:
does it matter if i move one existing disk to another bay, from 1 to 3, for example?

If you power off the NAS, then move the disks across then power back on it should work fine, but there's no need to rearrange the disks.