Re: Uhh...Informix on block device?!

In article <5jboq8$ld0$3@tst.hk.super.net>, Mr Cheuk Kong Lo <cklo@news.hk.super.net> writes >Dear Gurus, > >I'm just taking up a sysadm/DBA on a new job. Just found that our Informix >is using raw chunks but these chunks point to the block device under >/dev. (e.g., /dev/lv00 as opposed to /dev/rlv00). > >This is _extremely_ weird to me, as I know we should use /dev/rlv00, but >Informix is still happy about it. I'm concerned about the /dev/lv00 is >buffered I/O device and something worst could happen. On the other >hand, a simple "dd" tests shows (not surprisingly) the block device are >faster than raw devices...so... > >Any input to help me to talk out with management... With a buffered I/O device Online cannot guarantee that data written to the device will actually get written to disk. Hence reliability decreases. > >Thanks. > >Chris > > -- David Williams