1 .. SPDX-License-Identifier: GPL-2.0
2
3 ======================================
4 Linux SCSI Disk Driver (sd) Parameters
5 ======================================
6
7 cache_type (RW)
8 ---------------
9 Enable/disable drive write & read cache.
10
11 =========================== === === ======
12 cache_type string WCE RCD Write
13 =========================== === === ======
14 write through 0 0 off
15 none 0 1 off
16 write back 1 0 on
17 write back, no read (daft) 1 1 on
18 =========================== === === ======
19
20 To set cache type to "write back" and save thi
21
22 # echo "write back" > cache_type
23
24 To modify the caching mode without making the
25 "temporary " to the cache type string. E.g.::
26
27 # echo "temporary write back" > cache_type
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