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.:
# echo "temporary write back" > cache_type