Choosing the Right Disk Technology in a High Availability Environment DRAFT Version 2.0, August 1996

DRAFT -- Revision 2.0
August 22, 1996Page 31
- not officially supported by HP-UX drivers
CAPACITY
Capacity is determined by the following factors: available interface slots in the SPU,
operating system limitations, maximum number of disks per link, largest capacity disk
drive available, performance guidelines, and testing. Tables B through F can be used
to compare maximum capacities for the various disk types. The numbers in these
tables are maximums. Actual configuration limits will be smaller in multi-initiator
(shared bus) configurations. See the section on performance to learn the impact of
multi-initiator environments on the maximum number of disks on a disk link.
Table B: Maximum Link Capacity by Disk Type
Maximum targets Maximum Maximum Total
Recommended Capacity per Capacity per F/W
& Link Limit Target† SCSI Interface
Standalone JBODs*
5 - 10 15 2 GB 20 GB
High Availability
Storage System
(HASS)
5 - 10 15 4 GB 40 GB
HP-FL Disk Arrays
(FLDAs)
4 8 10 GB 40 GB
F/W SCSI Disk
Arrays (SCSI DAs)
3 7 10 GB 30 GB
HA Disk Arrays
(HADAs)**
4 15 40 GB*** 160 GB
AutoRAID Disk
Array
4 15 25.2 GB**** 100.8 GB****