环境 AIX 4.3
问题 6230 SSA卡上快写缓存的设置？
解答 对于使用SSA卡的用户，卡上的快写缓存可以极大的提高磁盘的I/O性能，用户应首先检查SSA卡上是否配置了快写缓存。
# lscfg -vl ssa0 DEVICE LOCATION DESCRIPTION ssa0 11-08 IBM SSA 160 SerialRAID Adapter (14109100) Part Number................. 27H1204 FRU Number.................. 34L5388 Serial Number...............S1072088 EC Level.................... E28793 Manufacturer................IBM053 ROS Level and ID............8300 0000 Loadable Microcode Level....05 Device Driver Level.........00 Displayable Message.........SSA-ADAPTER* Device Specific.(Z0)........SDRAM=128* Device Specific.(Z1)........CACHE=32 Device Specific.(Z2)........UID=006094BF00003CDC Device Specific.(YL)........U0.1-P1-I1/Q1 此卡配置了128MB的读缓存和32MB的快写缓存。如果配置了快写缓存，改变SSA磁盘的配置，使其使用快写缓存# smitty device SSA Disks SSA Logical Disks Change/Show Characteristics of an SSA Logical Disk hdisk? Available 11-08-L SSA Logical Disk Drive Enable Fast-Write yes 如果'Enable Fast-Write' 是no，将其改为yes。