PowerEdge HDD/SCSI/RAID

[yajtsav2]

hi specialists, 

here is what we are going to install:

perc H840 Raid adapter will be used for the MD1400, should we configure  global hotspare?

what is the best practices?

thanks and regards

[DELL-Shine K · Accepted solution]

You can use a global hot spare to automatically replace a failed physical disk in any redundant array as long as the capacity of the global hot spare is equal to or larger than the capacity of the failed physical disk. So in this case if any of the disk in RAID 6 is failed global hot spare will replace it till you replace failed drive with working one.

[yajtsav2]

thanks

just thinking about using all 14x 4TB for a raid6 and the other 8x 4TB raid 6 without hot spare or should i reserve 1x 4TB for HS?

[DELL-Shine K]

You need to take a call between additional space and extra redundancy. If you are ok with 2 disk redundancy you can go ahead without HS. If you need additional disk failure  protection you can have HS.

[JSz]

In most cases you should use a hot spare, even though you'll 'lose' about one disk worth of capacity that way.

[DELL-Young E · Accepted solution]

Hi, JSz is correct and also, you need a hot spare for RAID 1+0 as well.