IBM 86607SU Hardware Maintenance Manual - Page 129

To change the write policy: 1. Start the ServeRAID Configuration program (see "Starting the ServeRAID Configuration program" on page 77). 2. Select Advanced Functions from the Main Menu; then, press Enter. 3. Select Logical Drive Parms Management from the Advanced Functions menu; then, press Enter. 4. Select Change Write Policy from the next menu; then, press Enter. A screen similar to the following appears. IBM ServeRAID Adapter Disk Array Configuration Ver. X.XX Adapter Number: 1 Bus Number: 0 Host ID = Null Config Logical Drive Params Management 1. Help 2. Change Write Policy 3. Set NVRAM Cache Controller 4. Exit Array Log ID Size Drv A 1920 A0 B 2006 B0 A1 B1 Size RAID Wrt (MB) Level Status Pol 100 RAID-0 OKY WT 100 RAID-0 OKY WT 200 RAID-0 OKY WT 200 RAID-1 OKY WT Ch 1 Array Bay 1 ONL A 2 ONL A 3 ONL A 4 5 6 7 8 INI 9 10 11 12 13 14 15 16 Ch 2 Array Bay 1 HSP 2 ONL B 3 4 5 ONL B 6 RDY 7 CDR 8 INI 9 10 11 12 13 14 15 16 Select logical drive and press Enter to toggle the write policy. Press the ESC key to make the change. 5. Locate the Wrt Pol field in the Logical Drive list. The write policy is shown as either write through (WT), which is the default setting, or write back (WB). 6. Select the logical drive whose write policy you want to change. Attention If you change the write policy to WB, wait at least 10 seconds after the last operation before you turn off the system. It takes that long for the system to move the data from the cache memory to the storage device. Failure to follow this practice can result in lost data. 7. Press Enter to change the write policy. (You can press Enter to toggle between WT and WB.) 8. Press Esc. The Confirm pop-up window appears. 9. Select Yes to save the changes, or select No to return the setting to its original state; then, press Enter. 10. Back up the disk-array configuration information to diskette. See "Backing up the disk-array configuration" on page 126 for more information. Netfinity 5500 - Type 8660 121