The spare disk on one of my raids failed. Here’s how to replace.
[root@cp x86_64]# ./tw_cli //cp> info Ctl Model (V)Ports Drives Units NotOpt RRate VRate BBU ------------------------------------------------------------------------ c8 9650SE-8LPML 8 6 1 0 1 1 - //cp> info c8 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 DEVICE-ERROR u? 465.76 GB 976773168 WD-WCANU2051520 p2 OK u0 465.76 GB 976773168 WD-WCAS84972002 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-WCASY8726207 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - - //cps1> maint remove c8 p1 Removing port /c8/p1 ... Done. //cp> info c8 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 NOT-PRESENT - - - - p2 OK u0 465.76 GB 976773168 WD-WCAS84972002 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-WCASY8726207 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - - //cp> info c8 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 NOT-PRESENT - - - - p2 OK u0 465.76 GB 976773168 WD-WCAS84972002 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-WCASY8726207 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - - //cp> info c8 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 - 465.76 GB 976773168 WD-WMAYP5602245 p2 OK u0 465.76 GB 976773168 WD-WCAS84972002 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-WCASY8726207 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - - //cp> /c8/u0 start rebuild disk=1 Sending rebuild start request to /c8/u0 on 1 disk(s) [1] ... Failed. (0x0B:0x0031): Unit is ok //cp> info c8 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 - 465.76 GB 976773168 WD-WMAYP5602245 p2 OK u0 465.76 GB 976773168 WD-WCAS84972002 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-WCASY8726207 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - - //cp> /c8 add type=spare disk=1 Creating new unit on controller /c8 ... Done. The new unit is /c8/u1. WARNING: This Spare unit may replace failed drive of same interface type only. //cp> info c8 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 u1 465.76 GB 976773168 WD-WMAYP5602245 p2 OK u0 465.76 GB 976773168 WD-WCAS84972002 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-WCASY8726207 p6 NOT-PRESENT - - - - p7 NOT-PRESENT - - - - //cp>