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- Newsgroups: comp.os.os2.programmer
- Path: sparky!uunet!gatech!concert!rock!!rls
- From: rls@.wedge.nt.com (Robert L. Smith)
- Subject: Hard Disk Interrupts?
- Message-ID: <1992Jul26.150420.3389@rock.concert.net>
- Summary: Can OS2/2.0 handle them?
- Sender: news@rock.concert.net
- Organization: Northern Telecom Inc., RTP, NC
- Date: Sun, 26 Jul 1992 15:04:20 GMT
- Lines: 17
-
- I've been using OS2/2.0 for a month or so, on a '386DX with two
- hard drives, and get the impression that OS2 does nothing else --
- i.e., suspends multitasking -- while a hard disk operation is in
- progress. If true, the reason may be that OS2 must poll the hard
- drive adapter to detect completion. One piece of evidence for this
- conclusion (among others) is that a simple disk-to-disk copy operation
- in one partition disrupts a 9600-baud com transfer controlled by
- another.
- The hard disk adapter on my machine is SCSI. It contains posts
- for a jumper, presently missing, to enable interrupts for operation
- complete. Can anyone say whether or not OS2/2.0 is capable of using
- the hard disk interrupt? Is there a mode whereby the OS allows non-
- disk activities to proceed while disk-I/O is outstanding and depends
- upon the interrupt to recover the disk-bound thread? If so the
- benefits are obvious and I'd like to take advantage of them.
-
- Regards, rLs
-