During implementation of SRM we had the question where the RW clone that gets created during a SRM test is located. It should be in the aggregate containing the volume, because that's also where the snapshot is located. However, we decided to check.

Note: This is with the NetApp SRA, other storage vendors might use different replication techniques resulting in different architecture.

After performing a SRM test we could see the following information.

With the command vol status you can check the various volumes involved:

Source volume:

filer01b> vol status R_FC_PRD_01
         Volume State           Status            Options
R_FC_PRD_01 online          raid4, flex       nosnap=on, no_atime_update=on,
                                mirrored          snapmirrored=on, create_ucode=on,
                                snapmirrored      fs_size_fixed=on,
                                read-only         fractional_reserve=0
                                64-bit
                Volume has clones: testfailoverClone_nss_v10745371_R_FC_PRD_01
                         Volume UUID: d1797cc3-744b-11e2-b103-123478563412
                Containing aggregate: 'aggr0'

Cloned volume:

filer01b> vol status testfailoverClone_nss_v10745371_R_FC_PRD_01
         Volume State           Status            Options
testfailoverClone_nss_v10745371_R_FC_PRD_01 online          raid4, flex       nosnap=on, no_atime_update=on,
                                mirrored          create_ucode=on, guarantee=none,
                                64-bit            fractional_reserve=0
                Clone, backed by volume 'R_FC_PRD_01', snapshot 'filer01b(0151702703)_R_FC_PRD_01.3682'
                         Volume UUID: 6560861a-7691-11e2-b103-123478563412
                Containing aggregate: 'aggr0'

As you can see is the clone located in aggregate aggr0. Also, you can see that although the source volume has a space guarantee, the clone does not.

If you prefer OnCommand to view this information you can:

With the command lun show you can also check the LUN which is connected to the ESX servers:

filer01b> lun show -v /vol/testfailoverClone_nss_v10745371_R_FC_PRD_01/R_FC_PRD_SRM
        /vol/testfailoverClone_nss_v10745371_R_FC_PRD_01/R_FC_PRD_SRM     25g (26843545600)   (r/w, online, mapped)
                Comment: "Tijdelijk lun for SRM testing"
                Serial#: 2FfBf]BKxrzZ
                Share: none
                Space Reservation: disabled
                Multiprotocol Type: vmware
                Maps: srmtest_v10745371_domain-c36_fcp=0
                Occupied Size:   13.9g (14894223360)
                Creation Time: Mon Feb 11 15:10:11 CET 2013
                Cluster Shared Volume Information: 0x0

filer01b> lun show -m /vol/testfailoverClone_nss_v10745371_R_FC_PRD_01/R_FC_PRD_SRM
/vol/testfailoverClone_nss_v10745371_R_FC_PRD_01/R_FC_PRD_SRM srmtest_v10745371_domain-c36_fcp        0       FCP

If you prefer OnCommand to view this information you can: