從disksafe.log可以看到DiskSafe的細部動作，了解log可以讓你更加認識DiskSafe的行為，以及協助troubleshouting。
從disksafe.log可以看到DiskSafe的細部動作，了解log可以讓你更加認識DiskSafe的行為，以及協助troubleshouting。

建立policy的指令我們已經介紹過，譬如我們要protect /dev/sdb:

 dscli disk protect primary=sdb server=172.30.10.23 protocol=iscsi 

從disksafe.log中我們可以看到以下一連串的動作:

2011-10-12 16:30:51 (T99330960) |W|  Assigning mirror disk with sectors: 31457280
2011-10-12 16:30:52 (T99330960) |W|  Successfully assigned mirror disk over protocol 0(2:FC, 4:iSCSI). Disk No: 2224, WWID: 6000d77cf548439b761e00004e954e5d
2011-10-12 16:30:54 (T99330960) |I|  Refresh disks information begin...
2011-10-12 16:30:54 (T99330960) |I|  Getting disks information from kernel driver...
2011-10-12 16:30:54 (T99330960) |R|  Disk 2208(/dev/sdk) arrived, ID: FALCON__IPSTOR_DISK_____6000d77cf548439b761e00004e954e5d, capacity: 16106127360, number of partitions: 0, is dynamic disk: no
2011-10-12 16:30:54 (T99330960) |I|  Refresh disks information end
2011-10-12 16:30:54 (T99330960) |W|  dsksaferpc_createipstordisk_1_svc, successfully cleaned meta data on disk /dev/sdk
2011-10-12 16:30:54 (T99330960) |I|  dsksaferpc_enablemirror_1_svc IN
2011-10-12 16:30:54 (T99330960) |W|  Enable mirror, Primary device /dev/sdb is NOT PV. Not checking if UMAP device is an LV.
2011-10-12 16:30:54 (T99330960) |I|  Succeeded to add policy to registry for disk /dev/sdb with mirror disk /dev/sdk
2011-10-12 16:30:54 (T148482960) |R|  Protection thread for disk /dev/sdb with mirror disk /dev/sdk started
2011-10-12 16:30:54 (T148482960) |R|  Begin to wait for driver prepare umap for disk /dev/sdb with mirror disk /dev/sdk
2011-10-12 16:30:54 (T41180048) |R|  Protection statistic thread for disk /dev/sdb with mirror disk /dev/sdk started.
2011-10-12 16:30:55 (T99330960) |E|  Scanning file system to create UMAP for disk /dev/sdb with mirror disk /dev/sdk
2011-10-12 16:30:55 (T99330960) |R|  It's time for initial synchronization for disk /dev/sdb with mirror disk /dev/sdk
2011-10-12 16:30:55 (T99330960) |I|  Succeeded to change state from idle to sync-snapshot for disk /dev/sdb with mirror disk /dev/sdk
2011-10-12 16:30:55 (T99330960) |R|  Start daily initial sync-snapshot for disk /dev/sdb with mirror disk /dev/sdk
2011-10-12 16:30:55 (T99330960) |R|  Succeeded to create protection for disk /dev/sdb with mirror disk /dev/sdk
2011-10-12 16:30:55 (T99330960) |C|  [INFO] Disk /dev/sdb:0 is protected with mirror disk /dev/sdk. Mode: Periodic. Initial sync time: 2011-10-12 16:30:54. Initial sync option: Copy only sectors used by file system.
2011-10-12 16:30:56 (T148482960) |R|  Driver prepare umap for disk /dev/sdb with mirror disk /dev/sdk successfully
2011-10-12 16:30:56 (T148482960) |I|  Command sync-snapshot received for disk /dev/sdb with mirror disk /dev/sdk
2011-10-12 16:30:56 (T148482960) |C|  [INFO] Disk /dev/sdb:0 initial synchronization started.
2011-10-12 16:33:45 (T148482960) |C|  [INFO] Disk /dev/sdb:0 synchronization completed. Total data processed: 8769 MB. Total changed data transmitted: 8769 MB. Total time: 169 seconds. Average speed: 53133 KB/s.
2011-10-12 16:33:49 (T148482960) |R|  Succeeded to take disk /dev/sdb with mirror disk /dev/sdk to in-sync state
2011-10-12 16:33:49 (T148482960) |I|  Policy disk /dev/sdb with mirror disk /dev/sdk syncing cycle count is 0
2011-10-12 16:33:49 (T148482960) |D|  Syncing file system before taking snapshot of a disk.
2011-10-12 16:33:49 (T148482960) |R|  Skip snapshot agent initiation as no disks in policy {58c19944-5f35-4145-bb5d-c27dccfb1c41} are mounted
2011-10-12 16:33:49 (T148482960) |R|  Protection disk /dev/sdb with mirror disk /dev/sdk is IN_SYNC, state, 2, delta, 0, before taking disk snapshot
2011-10-12 16:33:49 (T148482960) |E|  Waiting for protection disk /dev/sdb with mirror disk /dev/sdk to come to OUT-OF-SYNC after suspending in-sync mirror.
2011-10-12 16:33:56 (T148482960) |C|  [INFO] Disk /dev/sdb:0 scheduled snapshot created. Timestamp: 2011-10-12 16:33:50.
2011-10-12 16:33:56 (T148482960) |R|  Succeeded to take scheduled snapshot for disk /dev/sdb with mirror disk /dev/sdk in SyncingAndSnapshotProc, disksafe timestamp: 1318408430(2011-10-12 16:33:50)

從以上我們可以看到DiskSafe在建立policy時會進行以下動作:

1. Assigning mirror disk (form CDP server), Disk 2208 (/dev/sdk).
2. Enable mirror for /dev/sdb.
3. Scanning file system to create UMAP for disk /dev/sdb with mirror disk /dev/sdk.
4. Initial synchronization for disk /dev/sdb with mirror disk /dev/sdk.
5. 預設policy mode為: periodic, 且只sync使用中的sectors.
6. Syncing file system before taking snapshot of a disk.
7. Take snapshot.

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