HP StorageWorks HSG80 Enterprise Modular Storage RAID Array Fibre Channel Solution Software V8.8 for Sun Solaris Release Notes (AA-RV1SA-TE, March 2005)

Host Operating System Notes
43HSG80 Enterprise Modular Storage RAID Array Fibre Channel Solution Software V8.8 for Sun
Solaris Release Notes
To properly configure a storageset where the logical geometry exceeds these
values, follow these steps:
1. Get the size of the storageset by performing a
SHOW on the unit from the CLI
on the array controller (e.g.
SHOW D100). This results in a display with the
following format:
LUN Uses
----------------------------------------------------
D100 S0
LUN ID:6000-1FE1-0000-13E0-0009-8090-0624-0147
NOIDENTIFIER
Switches:
RUN NOWRITE_PROTECT READ_CACHE
READAHEAD_CACHE WRITEBACK_CACHE
MAXIMUM_CACHED_TRANSFER_SIZE = 2048
Access: ALL
State: ONLINE to this controller
Not reserved
Size: 248768478 blocks
Geometry (C/H/S): ( 73601 / 20 / 169 )
2. Record your results. Your actual numbers vary depending on the exact size of
your storageset. The values given represent the number of data cylinders (cyl),
the number of heads (hd), and the number of sectors per track (sec).
Note: In the above example, the Solaris format command reports the cylinder count
(cyl + alt) as 8065, giving a much smaller total block count for the above storageset.
3. Make your calculations. The goal of the calculation process is to ensure that
all parameters end up in the valid ranges specified earlier in this section.
Throughout the calculation, the total number of blocks should remain constant
or as close to the original value without exceeding it. This is achieved by
dividing one value (e.g. cylinders) by the same amount as one of the other
values (e.g. heads) is multiplied. In this example, we divide the number of
cylinders and multiply the number of heads by the same value: 3. This results
in the following values:
■ 24533 cylinders
■ 60 heads