100
1.
If there are two or more snapshots existed, the system will try to remove the oldest
snapshots (to release more space for the latest snapshot) until enough space is
released.
2.
If there is only one snapshot existed, the snapshot will fail. Because the snapshot
space is run out.
For example, there are two or more snapshots existed on a VD and the latest snapshot
keeps growing. When it comes to the moment that the snapshot space is run out, the
system will try to remove the oldest snapshot to release more space for the latest
snapshot usage. As the latest snapshot is growing, the system keeps removing the old
snapshots. When it comes that the latest snapshot is the only one in system, there is no
more snapshot space which can be released for incoming changes, then snapshot will fail.
•
How many snapshots can be created on a VD
There are up to 32 snapshots can be created on a UDV/VD. What if the 33rd snapshot has
been taken? There are two different situations:
1.
If the snapshot is configured as
auto snapshot
, the latest one (the 33rd snapshot)
will replace the oldest one (the first snapshot) and so on.
2.
If the snapshot is taken manually, when taking the 33rd snapshot will fail and a
warning message will be showed on Web UI.
•
Rollback / Delete snapshot
When a snapshot has been rollbacked, the other snapshots which are earlier than it will
also be removed. But the rest snapshots will be kept after rollback. If a snapshot has been
deleted, the other snapshots which are earlier than it will also be deleted. The space
occupied by these snapshots will be released after deleting.
5.5
Disk roaming
Physical disks can be re-sequenced in the same system or move all physical disks in the
same RAID group from system-1 to system-2. This is called disk roaming. System can
execute disk roaming online. Please follow the procedures.
1.
Select
“/ Volume configuration / RAID group”
.
2.
Check the gray button next to the RG number; click
“Deactivate”
.
3.
Move all PDs of the RG to another system.
4.
Check the gray button next to the RG number; click
“Activate”
.
5.
Done.
Disk roaming has some constraints as described in the followings:
Содержание P300H61
Страница 27: ...27 Figure 2 5 2 The following topology is the connections for console and UPS optional Figure 2 5 3 ...
Страница 79: ...79 ...
Страница 110: ...110 Figure 5 7 1 2 ...
Страница 145: ...145 This form can be got from QSAN ftp ftp ftp qsan com tw QSAN_Support_Form doc ...
Страница 148: ...148 Figure B 1 3 Click Done Figure B 2 Figure B 3 ...
Страница 151: ...151 Figure B 8 Figure B 9 15 Click Add 16 Click Advanced ...
Страница 153: ...153 Figure B 14 22 Done the iSCSI device disconnect successfully ...
Страница 154: ...154 System information P300H61 P300H71 SW version 2 0 1 ...
