Create a snapshot of an NSS pool.
nlvm [nlvm_options] create snap <name> <pool> <device> <size> [chunk]
Mandatory. Specify the name of the NSS snapshot. This name must be a unique snap name on the server. The snap name is automatically converted to uppercase.
Pool snapshot names are 2 to 15 characters. The naming conventions are the same as for pools.
Mandatory. Specify the name of an existing pool that you want to snap.
Specify the device where you want to create a partition to be used to store copy-on-write data.
Specify the size of the partition used to store copy-on-write data. The minimum size is 1 MB; there is no maximum.
NSSMU restricts the size of Snapshots, with a minimum size of 50 MB, and a maximum size of 8 TB.
Specify the chunk size of the snapshot in bytes. The default size is 64 KB. The chunk size must be a power of 2, with the minimum size of 512 bytes, and a maximum size of 256 KB.
Create a snapshot named POOL1SNAP of pool MYPOOL1. The copy-on-write partition is on device /dev/sdb and of size 20 GB, and the snapshot chunk size is 128 KB.