RAID Array 450 HSZ50 HSOF Software Version 5.7 for Compaq Tru64 UNIX Release Notes

Release Notes
AA–R1ZZE − TE Page 39
8.0 Documentation Additions and Corrections
The following sections describe corrections to:
8.1 Array Controller HSOF Version 5.1 Configuration Manual
8.2 Array Controller HSOF Version 5.1 CLI Reference Manual.
8.3 Array Controller HSOF Version 5.1 Service Manual
8.1 Array Controller HSOF V5.1 Configuration Manual
8.1.1 Chunk Size
Referring to the section titled Initialize Switches in the HSZ50 Array
Controller HSOF Version 5.1 Configuration Manual, pages 3-18 through 3-20
the information regarding “Chunk Size” should be replaced with the following
information.
The information on maximum chunk size was incorrect and has been removed.
In addition, cautionary information on using the default chunk size as well as
information on calculating chunk size, increasing the request rate, increasing
the data transfer rate and increasing sequential write performance have been
included and are to be added to the documents referenced.
8.1.1.1
Specifying Chunk Size
Specify the chunk size of the data to be stored to control the stripesize used in
RAIDsets and stripesets:
• CHUNKSIZE=DEFAULT
lets the controller set the chunk size based on the number of disk drives (d)
in a stripeset or RAIDset.
If d
≤ 9 then chunk size = 256 or 128 kilobytes (K)
If d > 9 then chunk size = 128 or 64 kilobytes (K)