3PAR disk spin-down could not find relocation target error

[vp77dw]

Hi,

I am trying to spin down a few disks on a 3PAR 8440-4 storage by executing the following commands:

cli% setpd ldalloc off 82;removespare -f 82:a;movepd -f -perm 82;dismisspd 82;controlpd spindown <Node_WWN>

and getting the following error:

Error: Could not find relocation target for one or more chunklets

The same error is not printed when executing the command

movepdtospare -f -devtype -ovrd -perm -nowait 82

instead of:

movepd -f -perm 82

The options specified in the command ('movepdtospare -f -devtype -ovrd -perm -nowait') are:

-f: Force the move even if the disk is in use.
-devtype: Specifies the device type of the disk to be moved.
-ovrd: Overrides any restrictions or warnings.
-perm: Moves the disk permanently to the spare disk.
-nowait: Moves the disk without waiting for confirmation.

The array has plenty of free space for the LDs:

cli% showspace -cpg SSD_r*
             --------------------------(MiB)---------------------------
         CPG ---------EstFree----------                                 -----------Efficiency------------
        Name   RawFree    LDFree OPFree     Base     Snp  Free    Total Compact Dedup Compress DataReduce Overprov
      SSD_r1 171268096  85634048      -        0       0     0        0       -     -        -          -     0.00
      SSD_r5 155918336 116938752      -        0 2060288 28672  2088960   10.24     -        -          -     0.35
      SSD_r6 155901952 116926464      - 85346816   22528 26112 85395456    1.98     -        -          -     0.65
   SSD_r10_A  59846656  29923328      -  1228800    1024 31744  1261568    1.00     -        -          -     0.04
   SSD_r10_B  54214656  27107328      -  1228800    1024 31744  1261568    1.00     -        -          -     0.04
     SSD_r10 171268096  85634048      -        0       0     0        0       -     -        -          -     0.00
SSD_r10_3way 171300864  57100288      -  7393664       0 32384  7426048    2.13     -        -          -     0.24

cli% showpd -c -sortcol 1
                                 ---------- Normal Chunklets ---------- ---- Spare Chunklets -----
                                 -- Used --- --------- Unused --------- - Used - ---- Unused -----
 Id CagePos Type State     Total     OK Fail   Free Uninit Unavail Fail OK  Fail  Free Uninit Fail
  0 0:0:0   SSD  normal     3575   1452    0   1873      0       0    0  0     0   250      0    0
  1 0:1:0   SSD  normal     3575   2817    0    508      0       0    0  0     0   250      0    0
  2 0:2:0   SSD  normal     3575   2613    0    712      0       0    0  0     0   250      0    0
  3 0:3:0   SSD  normal     3575   1445    0   1880      0       0    0  0     0   250      0    0
  4 0:4:0   SSD  normal     3575   1502    0   1823      0       0    0  0     0   250      0    0
  5 0:5:0   SSD  normal     3575   1504    0   1821      0       0    0  0     0   250      0    0
  6 0:6:0   SSD  normal     3575   1505    0   1820      0       0    0  0     0   250      0    0
  7 0:7:0   SSD  normal     3575   1503    0   1822      0       0    0  0     0   250      0    0
 42 0:8:0   SSD  normal     3575   1500    0   1825      0       0    0  0     0   250      0    0
 65 0:9:0   SSD  normal     3575   1498    0   1827      0       0    0  0     0   250      0    0
--- 0:10:0  SSD  failed     3575      0    0      0      0       0    0  0     0     0      0    0
--- 0:11:0  SSD  failed     3575      0    0      0      0       0    0  0     0     0      0    0
  8 1:0:0   SSD  normal     3575   1515    0   1810      0       0    0  0     0   250      0    0
  9 1:1:0   SSD  normal     3575   1447    0   1878      0       0    0  0     0   250      0    0
 10 1:2:0   SSD  normal     3575   1643    0   1682      0       0    0  0     0   250      0    0
 11 1:3:0   SSD  normal     3575   2721    0    604      0       0    0  0     0   250      0    0
 12 1:4:0   SSD  normal     3575   1510    0   1815      0       0    0  0     0   250      0    0
 13 1:5:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 14 1:6:0   SSD  normal     3575   1508    0   1817      0       0    0  0     0   250      0    0
 15 1:7:0   SSD  normal     3575   1502    0   1823      0       0    0  0     0   250      0    0
 66 1:8:0   SSD  normal     3575   1498    0   1827      0       0    0  0     0   250      0    0
 67 1:9:0   SSD  normal     3575   1494    0   1831      0       0    0  0     0   250      0    0
 82 1:10:0  SSD  degraded   3575   1023    0      0      0    2552    0  0     0     0      0    0
 83 1:11:0  SSD  normal     3575   1493    0   1832      0       0    0  0     0   250      0    0
 16 2:0:0   SSD  normal     3575   1513    0   1812      0       0    0  0     0   250      0    0
 17 2:1:0   SSD  normal     3575   1631    0   1694      0       0    0  0     0   250      0    0
 18 2:2:0   SSD  normal     3575   1440    0   1885      0       0    0  0     0   250      0    0
 19 2:3:0   SSD  normal     3575   1443    0   1882      0       0    0  0     0   250      0    0
 20 2:4:0   SSD  normal     3575   1503    0   1822      0       0    0  0     0   250      0    0
 21 2:5:0   SSD  normal     3575   1502    0   1823      0       0    0  0     0   250      0    0
 22 2:6:0   SSD  normal     3575   1503    0   1822      0       0    0  0     0   250      0    0
 23 2:7:0   SSD  normal     3575   1499    0   1826      0       0    0  0     0   250      0    0
 68 2:8:0   SSD  normal     3575   1499    0   1826      0       0    0  0     0   250      0    0
 69 2:9:0   SSD  normal     3575   1491    0   1834      0       0    0  0     0   250      0    0
 84 2:10:0  SSD  normal     3575   1498    0   1827      0       0    0  0     0   250      0    0
 85 2:11:0  SSD  normal     3575   1493    0   1832      0       0    0  0     0   250      0    0
 24 3:0:0   SSD  normal     3575   1440    0   1885      0       0    0  0     0   250      0    0
 25 3:1:0   SSD  normal     3575   1441    0   1884      0       0    0  0     0   250      0    0
 26 3:2:0   SSD  normal     3575   1439    0   1886      0       0    0  0     0   250      0    0
 27 3:3:0   SSD  normal     3575   1441    0   1884      0       0    0  0     0   250      0    0
 28 3:4:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 29 3:5:0   SSD  normal     3575   1502    0   1823      0       0    0  0     0   250      0    0
 30 3:6:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 31 3:7:0   SSD  normal     3575   1502    0   1823      0       0    0  0     0   250      0    0
 70 3:8:0   SSD  normal     3575   1492    0   1833      0       0    0  0     0   250      0    0
 71 3:9:0   SSD  normal     3575   1491    0   1834      0       0    0  0     0   250      0    0
 86 3:10:0  SSD  normal     3575   1497    0   1828      0       0    0  0     0   250      0    0
 87 3:11:0  SSD  normal     3575   1493    0   1832      0       0    0  0     0   250      0    0
 32 4:0:0   SSD  normal     3575   1444    0   1881      0       0    0  0     0   250      0    0
 33 4:1:0   SSD  normal     3575   1440    0   1885      0       0    0  0     0   250      0    0
 64 4:2:0   SSD  normal     3575   1440    0   1885      0       0    0  0     0   250      0    0
 35 4:3:0   SSD  normal     3575   1441    0   1884      0       0    0  0     0   250      0    0
 36 4:4:0   SSD  normal     3575   1497    0   1828      0       0    0  0     0   250      0    0
 37 4:5:0   SSD  normal     3575   1499    0   1826      0       0    0  0     0   250      0    0
 38 4:6:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 39 4:7:0   SSD  normal     3575   1502    0   1823      0       0    0  0     0   250      0    0
 72 4:8:0   SSD  normal     3575   1494    0   1831      0       0    0  0     0   250      0    0
 73 4:9:0   SSD  normal     3575   1497    0   1828      0       0    0  0     0   250      0    0
 88 4:10:0  SSD  normal     3575   1492    0   1833      0       0    0  0     0   250      0    0
 89 4:11:0  SSD  normal     3575   1498    0   1827      0       0    0  0     0   250      0    0
 40 5:0:0   SSD  normal     3575   1445    0   1880      0       0    0  0     0   250      0    0
 41 5:1:0   SSD  normal     3575   1438    0   1887      0       0    0  0     0   250      0    0
 34 5:2:0   SSD  normal     3575   1439    0   1886      0       0    0  0     0   250      0    0
 43 5:3:0   SSD  normal     3575   1442    0   1883      0       0    0  0     0   250      0    0
 44 5:4:0   SSD  normal     3575   1504    0   1821      0       0    0  0     0   250      0    0
 45 5:5:0   SSD  normal     3575   1498    0   1827      0       0    0  0     0   250      0    0
 46 5:6:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 47 5:7:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 74 5:8:0   SSD  normal     3575   1489    0   1836      0       0    0  0     0   250      0    0
 75 5:9:0   SSD  normal     3575   1497    0   1828      0       0    0  0     0   250      0    0
 90 5:10:0  SSD  normal     3575   1490    0   1835      0       0    0  0     0   250      0    0
 91 5:11:0  SSD  normal     3575   1499    0   1826      0       0    0  0     0   250      0    0
 48 6:0:0   SSD  normal     3575   1438    0   1887      0       0    0  0     0   250      0    0
 49 6:1:0   SSD  normal     3575   1436    0   1889      0       0    0  0     0   250      0    0
 50 6:2:0   SSD  normal     3575   1441    0   1884      0       0    0  0     0   250      0    0
 51 6:3:0   SSD  normal     3575   1443    0   1882      0       0    0  0     0   250      0    0
 52 6:4:0   SSD  normal     3575   1500    0   1825      0       0    0  0     0   250      0    0
 53 6:5:0   SSD  normal     3575   1499    0   1826      0       0    0  0     0   250      0    0
 54 6:6:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 55 6:7:0   SSD  normal     3575   1503    0   1822      0       0    0  0     0   250      0    0
 76 6:8:0   SSD  normal     3575   1497    0   1828      0       0    0  0     0   250      0    0
 77 6:9:0   SSD  normal     3575   1499    0   1826      0       0    0  0     0   250      0    0
 92 6:10:0  SSD  normal     3575   1491    0   1834      0       0    0  0     0   250      0    0
 93 6:11:0  SSD  normal     3575   1497    0   1828      0       0    0  0     0   250      0    0
 56 7:0:0   SSD  normal     3575   1437    0   1888      0       0    0  0     0   250      0    0
 57 7:1:0   SSD  normal     3575   1440    0   1885      0       0    0  0     0   250      0    0
 58 7:2:0   SSD  normal     3575   1442    0   1883      0       0    0  0     0   250      0    0
 59 7:3:0   SSD  normal     3575   1439    0   1886      0       0    0  0     0   250      0    0
 60 7:4:0   SSD  normal     3575   1499    0   1826      0       0    0  0     0   250      0    0
 61 7:5:0   SSD  normal     3575   1500    0   1825      0       0    0  0     0   250      0    0
 62 7:6:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 63 7:7:0   SSD  normal     3575   1501    0   1824      0       0    0  0     0   250      0    0
 78 7:8:0   SSD  normal     3575   1492    0   1833      0       0    0  0     0   250      0    0
 79 7:9:0   SSD  normal     3575   1498    0   1827      0       0    0  0     0   250      0    0
 94 7:10:0  SSD  normal     3575   1495    0   1830      0       0    0  0     0   250      0    0
 95 7:11:0  SSD  normal     3575   1498    0   1827      0       0    0  0     0   250      0    0
--------------------------------------------------------------------------------------------------
 96 total                 343200 142924    0 167324      0    2552    0  0     0 23250      0    0

Like seen in the output above, I already the command 'movepdtospare -f -devtype -ovrd -perm -nowait' for 2 disks, and for the third disk the operations is being executed at the time the output was taken. 

So, my questions are:

1. How to identify the root cause for the error "Error: Could not find relocation target for one or more chunklets"?

2. Is it safe and advised to use the command with all the given options i.e. 'movepdtospare -f -devtype -ovrd -perm -nowait'?

[veeyarvi · Accepted solution]

Hi vp77dw,

1. Both movepd and movepdtospare does exactly the same. So would like to see in detail what/why there was an issue while running movepd at the first place. Please open a case with support if you eager to know the reason for the failure.

2. You can use the command safely if want to remove the PDs permanetly.

Regards,
Veeyaarvi

[support_s]

Hello,

Let us know if you were able to resolve the issue.

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[vp77dw]

Hello,

Thank you for your help.

With the movepdtospare command we were able to spin-down the required disks.

Best regards,

Ville

[Sunitha_Mod]

Hello @vp77dw,

That's Excellent! 

We are extremely glad to know the problem has been resolved and we appreciate you for keeping us posted.