i have 2 identical drives in my machine.

atacontrol cap ad4 says:


Protocol              Serial ATA II
device model          WDC WD1600JS-60NCB1
serial number         WD-WCANM4915646
firmware revision     10.02E02
cylinders             16383
heads                 16
sectors/track         63
lba supported         268435455 sectors
lba48 supported       312581808 sectors
dma supported
overlap not supported

Feature                      Support  Enable    Value           Vendor
write cache                    yes      no
read ahead                     yes      yes
Native Command Queuing (NCQ)   yes       -      31/0x1F
Tagged Command Queuing (TCQ)   no       no      31/0x1F
SMART                          yes      yes
microcode download             yes      yes
security                       no       no
power management               yes      yes
advanced power management      no       no      0/0x00
automatic acoustic management  no       no      0/0x00  0/0x00


while atacontrol cap ad6 says:
Protocol              Serial ATA II
device model          WDC WD1600JS-60NCB1
serial number         WD-WCANM4915646
firmware revision     10.02E02
cylinders             16383
heads                 16
sectors/track         63
lba supported         268435455 sectors
lba48 supported       312581808 sectors
dma supported
overlap not supported

Feature                      Support  Enable    Value           Vendor
write cache                    yes      no
read ahead                     yes      yes
Native Command Queuing (NCQ)   yes       -      31/0x1F
Tagged Command Queuing (TCQ)   no       no      31/0x1F
SMART                          yes      yes
microcode download             yes      yes
security                       no       no
power management               yes      yes
advanced power management      no       no      0/0x00
automatic acoustic management  no       no      0/0x00  0/0x00




HOW to enable write cache on second drive?

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