After rebooting a node with a spare drive in the raid, I got errors saying that the spare drive was an inoperable unit.
//cps1> info c0 Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy ------------------------------------------------------------------------------ u0 RAID-5 OK - - 64K 1862.61 ON OFF u1 RAID-5 INOPERABLE - - 64K 1862.61 OFF OFF Port Status Unit Size Blocks Serial --------------------------------------------------------------- p0 OK u0 465.76 GB 976773168 WD-WCANU2126397 p1 OK u0 465.76 GB 976773168 WD-WCANU2051520 p2 OK u1 465.76 GB 976773168 WD-WCANU2030999 p3 OK u0 465.76 GB 976773168 WD-WCAS84739115 p4 OK u0 465.76 GB 976773168 WD-WCANU2114264 p5 OK u0 465.76 GB 976773168 WD-WCANU2051215 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - -
To fix this, I just deleted the unit (u1) and added the disk back as a spare.
//cps1> /c0/u1 del Deleting /c0/u1 will cause the data on the unit to be permanently lost. Do you want to continue ? Y|N [N]: Y Deleting unit c0/u1 ...Done. //cps1> info c0 Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy ------------------------------------------------------------------------------ u0 RAID-5 OK - - 64K 1862.61 ON OFF Port Status Unit Size Blocks Serial --------------------------------------------------------------- p0 OK u0 465.76 GB 976773168 WD-WCANU2126397 p1 OK u0 465.76 GB 976773168 WD-WCANU2051520 p2 OK - 465.76 GB 976773168 WD-WCANU2030999 p3 OK u0 465.76 GB 976773168 WD-WCAS84739115 p4 OK u0 465.76 GB 976773168 WD-WCANU2114264 p5 OK u0 465.76 GB 976773168 WD-WCANU2051215 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - - //cps1> /c0 add type=spare disk=2 Creating new unit on controller /c0 ... Done. The new unit is /c0/u1. WARNING: This Spare unit may replace failed drive of same interface type only. //cps1> info c0 Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy ------------------------------------------------------------------------------ u0 RAID-5 OK - - 64K 1862.61 ON OFF u1 SPARE OK - - - 465.753 - OFF Port Status Unit Size Blocks Serial --------------------------------------------------------------- p0 OK u0 465.76 GB 976773168 WD-WCANU2126397 p1 OK u0 465.76 GB 976773168 WD-WCANU2051520 p2 OK u1 465.76 GB 976773168 WD-WCANU2030999 p3 OK u0 465.76 GB 976773168 WD-WCAS84739115 p4 OK u0 465.76 GB 976773168 WD-WCANU2114264 p5 OK u0 465.76 GB 976773168 WD-WCANU2051215 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - -
That is how it should look.