How to enable/setup Writeback on USB Flash Drive?
Currentyly I have Linux SuSe 2.6.22.19, I format a USB flash drive in EXT3 and mount it with the option of data=writeback. But when I use dmesg, it shows: "[sdb] Assuming drive cache: write through".
The questions are: - Is it possible to enable writeback on USB Drive? How to setup and enable it? - Are there any different writeback meanings between in mount option and in virtual memory? - Can the writeback parameters in /proc/sys/vm/ folder like dirty_writeback_centisecs, dirty_expire_centisecs, control writeback on USB drive? 3TTT |
Quote:
I do not think you can enable write back on USB drive as write back is supposed to have a local cache with a battery so when there is a power outage, the data are not lost as they are in the write-back cache and when the power comes back, the drives commit the change on disk from the cache. And I do not think USB flash have any battery. Quote:
HTH G. |
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