Compex Systems Advanced SerialRAID Adapters SA33-3285-02 - Manual (Page 237)

Bypassing the Cache in a One-Way Fast-Write Network
If you are using the two-way fast-write function (that is, two adapters have access to a
fast-write disk drive), you can choose whether you want fast-write operations to
continue if the partner adapter fails or becomes not accessible. By default , fast-write
operations continue.
1. For fast-path access to the Change/Show Characteristics of an SSA Logical Disk
menu:
a. Type smitty chgssardsk and press Enter.
b. From the menu displayed, select the logical disk that you want to change.
Otherwise:
a. Select Change/Show Characteristics of an SSA Logical Disk from the SSA
Logical Disks menu.
b. From the menu displayed, select the logical disk that you want to change.
A list of options for the logical disk drives is displayed:
Change/Show Characteristics of an SSA Logical Disk
Type or select values in entry fields.
Press Enter AFTER making all desired changes.
[MORE...6] [Entry Fields]
Location Label [ ]
Parent ssar
Size in Megabytes 4512
adapter_a ssa0
adapter_b ssa1
primary_adapter adapter_a +
Connection address 0004AC506C3600E
Physical volume IDENTIFIER 00406fdac2fb8203000000>
ASSIGN physical volume identifier no +
RESERVE disk on open yes +
Queue depth [5] +
Maximum Coalesce [0x20000] +
Enable Fast-Write yes +
Bypass Cache In 1 Way Fast-Write Network no +
[BOTTOM]
F1=HelpF2=Refresh F3=Cancel F4=List
F5=Reset F6=Command F7=Edit F8=Image
F9=Shell F10=Exit Enter=Do
2. If you do not want the fast-write function to continue on a particular disk drive if the
partner adapter becomes not accessible, set the Bypass Cache in 1 Way
Fast-Write Network flag to yes for that disk drive. With the flag set to yes, an error
is logged when the cache is bypassed.
If you want the fast-write function to continue on a particular disk drive if the partner
adapter becomes not accessible, set the Bypass Cache in 1 Way Fast-Write
Network flag to no for that disk drive.
Chapter 10. Using the Fast-Write Cache Feature 217