1

Recently I set up a Dell R720 to be a file server. 2 of the 16 drives were used for the OS (RAID 1) while the other 14 were used for RAID 10, or so I thought. I opened up OpenManage today and saw that there are 6 spans of drives but in one of those spans, there is only 1 drive. Looking deeper, I see that there is one drive not part of the RAID that is just in a "ready" state.

I swear that I didn't set it up like this but here we are. Is it possible to add this one drive to the RAID or am I going to need to blow away the whole thing and start over.

Side question, is it even possible to have a RAID 10 with an odd number of drives?enter image description here enter image description here

Vinny
  • 407
  • 2
  • 7
  • Seems likely that 'spare' failed or fell out of the volume or something. Are you sure it is in a healthy state? – Zoredache Sep 28 '17 at 06:31
  • I don't know why you got downvotes - it's perfectly possible to have a R1/10 with an odd-number of disks, either on purpose or by mistake. In fact HPE's newer disk controller very specifically allow for a three-disk R1 where there's essentially three copies of the data - not sure I know WHY they offer this but they do. – Chopper3 Sep 29 '17 at 15:41
  • @chopper3 Because three copies of a RAID dataset allows for more advanced self-healing features. I'm not certain if they're implementing them, but they better be with that amount of data copies. – Spooler Sep 29 '17 at 16:58
  • I saw something similar a short while ago. It was an issue with IDRAC in my case, though.. – batistuta09 Oct 02 '17 at 12:30

1 Answers1

1

I figured it out. I booted into the RAID BIOS and saw that the drive in question (drive 12) was showing as foreign. After re-seating the drive it started rebuild in the correct span. Not sure what happened but its fixed

Vinny
  • 407
  • 2
  • 7