IBM Advanced SerialRAID Adapters SA33-3285-02, User Manual

Page: 185 / 531

Example 2: Copying One Logical Volume
In this example, you are copying only one logical volume (-lv B) from the parent array to
the RAID-Copy array.
To copy one logical volume, give the commands:
ssa_make_copy -P -l lv_B
ssa_make_copy -l lv_B
Figure 26 shows, from left to right:
v
The parent array that contains the source volume group.
v
The empty RAID-Copy array coupled to the parent array.
v
The uncoupled RAID-Copy array that now contains a copy of the logical volume.
Note that in the copy, all names start with fs.
Although the purpose of this job is to copy the logical volume lv_B, by default the
ssa_make_copy command has copied the complete contents of hdisk hd_1, which
includes the logical volume lv_A. The logical volume fslv_A cannot be accessed,
however, because its loglv is on hdisk hd_2 and has not been copied. If a logical
volume has its loglv on a separate hdisk, the copy of that logical volume can be
accessed only if the hdisk that contains the loglv is also copied.
Figure 26. Copying One Logical Volume
Chapter 7. Copying Data from Arrays and from Volume Groups
165
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