if defer write = off, why use read/write instead of read Topic is solved

[nosiya]

Hello,

When defer write is not selected, what's the use of the read/write algorithm? Why not use read-only?

Thank you.

[Support]

Read/Write means that the written data are also copied to the cache buffer, so later if applications need to read these data, they can be got from the cache instead of the disks.
Read-only means that the written data are not copied to the cache buffer.