On 10/22/13 09:47, Mike Belopuhov wrote: > On 22 October 2013 15:22, Mark Kettenis <mark.kette...@xs4all.nl> wrote: >> Diff below makes bioctl(4) print the cache policy for that's currently >> in effect for RAID volumes. It only prints the state (WB for >> write-back, WT for write-through) if the RAID controller driver fills >> in the details in response to a BIOCVOL ioctl. This diff adds such >> support to mfi(4). >> >> # bioctl mfi0 >> Volume Status Size Device >> mfi0 0 Online 72746008576 sd0 RAID1 WB >> 0 Online 73407820800 1:0.0 noencl <HITACHI >> HUS153073VLS300 A598> >> 1 Online 73407820800 1:1.0 noencl <HITACHI >> HUS153073VLS300 A598> >> >> ok? >> >> > > mpii specs do not use terms write-back or write-through, they rather > talk about write cache being enabled or disabled. they obviously > mean write-back cache. i believe for the bioctl user it's more > important to know if actual writes are deferred or not, so i would > rather say "Write Cache Enabled/Disabled" or "Write Cache On/Off" or > something similar rather then if it's WB or WT. oterwise people will > have to look in the man page for what WB or WT stands for and then > search wikipedia for what does it mean.. > > just my 2 cents.
And my 1 cent is that I agree... I live, work and play with Dell hardware, been working with their RAID controllers for a loooong time, but I STILL need to think about "write through...write back... lessee... write THROUGH means it is going right to the disk, so not using the cache, that's bad, I want 'write back'" Nick.
