Should I have a hot spare with RAID 5?
Hot spares provide protection from hardware failure because slices from RAID 1 or RAID 5 volumes are automatically replaced and resynchronized when they fail. The hot spare can be used temporarily until a failed submirror or RAID 5 volume slice can be either fixed or replaced.
How do you make a hot spare in RAID 5?
The primary difference between RAID 5 and RAID 6 is that a RAID 5 array can continue to function following a single disk failure, but a RAID 6 array can sustain two simultaneous disk failures and still continue to function. RAID 6 arrays are also less prone to errors during the disk rebuilding process.
What is better RAID 5 +hot spare or RAID 6?
The RAID 5 spare has 4 disks; the fourth unit being used as a spare. This guarantees the safety of your data, with the spare only being used when one of the disks fails. In short, the RAID 5 spare meets your needs if you want to benefit from increased security.
What is RAID 5+spare?
RAID5+Spare: RAID 5+Spare is a RAID 5 array in which one disk is used as spare to rebuild the system as soon as a disk fails (Fig. 79). At least four disks are required. If one physical disk fails, the data remains available because it is read from the parity blocks. Data from a failed disk is rebuilt onto the hot spare disk.
Should I Go RAID5 or raid10 with a hot spare?
The spare is sitting close by, but you have to physically do the swap. If that is not an acceptable scenario, then RAID5 with a hot spare is the only answer left. Since you already have two RAID1 sets that have 1 drive failure tolerance, you really gain nothing by going RAID10 with no hot spare.
What is RAID 6?
RAID6: In RAID 6, data is striped across all disks (minimum of four) and a two parity blocks for each data block (p and q in Fig. 80) is written on the same stripe. If one physical disk fails, the data from the failed disk can be rebuilt onto a replacement disk.