UNSOLVED
Difference between start reclaim and start free.
Hi All,
Can someone explain the operational difference between the below commands
a) symconfigure -sid XXX -cmd "start free on tdev XXX start_cyl=0 end_cyl=last_cyl"; commit -nop
b) symconfigure -sid XXX -cmd "start reclaim on tdev XXX "; commit -nop
As per the EMC SE product guide 7.4 it says that there isn't any difference between the two commands.I have tested the same on test LUNS and found that it is true.But the question araised when i gave the commands on the Production LUN.
Please find the below output collected during the operation:
symconfigure -sid XXX -cmd "start reclaim on tdev 1438"; commit -nop
A Configuration Change operation is in progress. Please wait...
Establishing a configuration change session...............Established.
Processing symmetrix XXXXXXXXXXXXXX
Performing Access checks..................................Allowed.
Checking Device Reservations..............................Allowed.
Locking devices...........................................Locked.
Committing configuration changes..........................Started.
Committing configuration changes..........................Committed.
Terminating the configuration change session..............Done.
The configuration change session has successfully completed.
symcfg list -tdev -detail -gb -sid XXX |find "1438"
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
symcfg list -tdev -detail -gb -sid XXX -i 10|find "1438"
Dev Pool status Capacity Allocated Written
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..R 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..B 1024.0 4 1024 100 385.0 38
1438 TH3R5600FC28 F..B 1024.0 4 1024 100 385.0 38
*****Please note that no space was reclaimed
symconfigure -sid XXX -cmd "start free on tdev 1438 start_cyl=0 end_cyl=last_cyl"; commit -nop
A Configuration Change operation is in progress. Please wait...
Establishing a configuration change session...............Established.
Processing symmetrix XXXXXXXXXXXXXXXX
Performing Access checks..................................Allowed.
Checking Device Reservations..............................Allowed.
Locking devices...........................................Locked.
Committing configuration changes..........................Started.
Committing configuration changes..........................Committed.
Terminating the configuration change session..............Done.
The configuration change session has successfully completed.
symcfg list -tdev -detail -gb -sid XXX -i 10|find "1438"
Dev Pool status Capacity Allocated Written
1438 TH3R5600FC28 F..D 1024.0 4 1019 100 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 1001 98 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 992 97 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 991 97 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 990 97 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 980 96 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 970 95 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 956 93 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 944 92 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 934 91 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 928 91 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 922 90 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 914 89 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 900 88 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 886 87 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 872 85 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 859 84 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 849 83 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 840 82 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 828 81 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 816 80 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 804 79 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 793 77 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 781 76 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 768 75 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 758 74 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 748 73 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 737 72 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 727 71 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 723 71 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 719 70 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 713 70 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 703 69 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 691 68 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 679 66 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 669 65 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 660 64 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 650 63 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 641 63 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 634 62 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 629 61 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 625 61 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 621 61 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 615 60 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 607 59 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 598 58 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 549 54 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 536 52 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 525 51 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 513 50 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 502 49 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 489 48 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 477 47 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 466 46 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 455 44 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 447 44 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 438 43 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 430 42 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 422 41 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 414 40 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 405 40 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 399 39 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 394 39 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 389 38 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 387 38 385.0 38
1438 TH3R5600FC28 F..D 1024.0 4 386 38 385.0 38
1438 TH3R5600FC28 F..B 1024.0 4 385 38 385.0 38
1438 TH3R5600FC28 F..B 1024.0 4 385 38 385.0 38
The space was reclaimed in accordance with the amount of data that was written using start free option but not by the reclaim.
Thanks,
Nag
