Linux SCSI Disk Driver (sd) Parameters
cache_type (RW)
Enable/disable drive write & read cache.
cache_type string | WCE RCD | Write cache | Read cache
—————————-+———+————-+————
write through | 0 0 | off | on
none | 0 1 | off | off
write back | 1 0 | on | on
write back, no read (daft) | 1 1 | on | off
To set cache type to “write back” and save this setting to the drive:
echo “write back” > cache_type
To modify the caching mode without making the change persistent, prepend
“temporary “ to the cache type string. E.g.:
