User`s guide

Table 4–6 Read and Write-Back Cache Upgrade Ordering Information for HSZ40–A x and
HSZ40–B x Array Controllers
If you have... And you want... Order...
HSZ40 with
no cache
16-MB read cache
32-MB read cache
16-MB write-back cache
32-MB write-back cache
HSZ40–XD
HSZ40–XF
HSZ40–XD and HSZ40–YX
HSZ40–XF and HSZ40–YX
HSZ40 Version 2
16-MB read cache
32-MB read cache
16-MB write-back cache
32-MB write-back cache
HSZ40–XE
HSZ40–YX
HSZ40–XE and HSZ40–YX
HSZ40 Version 2
32-MB read cache
32-MB write-back cache HSZ40–YX
HSZ40 Version 2
16-MB write-back cache
32-MB write-back cache HSZ40–XE (use batteries from 16 MB module)
Note
Return all 16-MB read cache modules to Digital when ordering 32-MB
read cache module upgrades.
Refer to Appendix A for descriptions of the various upgrade and option numbers.
Installation 4–35