Messages in this thread | | | From | Systemkennung Linux <> | Subject | Re: Sharing SCSI disks | Date | Thu, 27 Mar 1997 19:32:54 +0100 (MET) |
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Hi,
> > Couldn't you just write data and call sync? > > No. One of the reasons is that the sync does not propagate > down. Devices with own caches have no way to get this information > and use it to flush their caches. > > Additionally you don't always want all and everything flushed. > Some pieces of data always need to be on disk, others can be written > delayed or even out of order. Those are patterns that you can't > implement without RAW devices.
An intelligent I/O system could still fuck up your software, ie. SCSI disk set to "ulimited reorder" which is fine for filesystems but fatal for some other things.
Ralf
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