22 messages in org.freebsd.freebsd-hardwareRe: O/S Support for large [512Mb] PC ...| From | Sent On | Attachments |
|---|---|---|
| Mr G.D. Tyson | Jun 19, 1998 3:15 am | |
| Brian Baird | Jun 19, 1998 4:40 am | |
| see...@plethora.net | Jun 19, 1998 5:04 am | |
| Paul Goyette | Jun 19, 1998 5:13 am | |
| see...@plethora.net | Jun 19, 1998 5:20 am | |
| Marc van Kempen | Jun 19, 1998 8:04 am | |
| Manuel Bouyer | Jun 19, 1998 10:10 am | |
| Jan B. Koum | Jun 20, 1998 6:58 pm | |
| Matthew Jacob | Jun 20, 1998 7:56 pm |  .Other, .Other, .Other |
| Matthew Jacob | Jun 20, 1998 8:42 pm | |
| Mike Smith | Jun 21, 1998 1:06 pm | |
| Mike Smith | Jun 21, 1998 1:36 pm | |
| Mike Smith | Jun 21, 1998 2:24 pm | |
| see...@plethora.net | Jun 21, 1998 3:03 pm | |
| Justin T. Gibbs | Jun 21, 1998 3:06 pm | |
| Open Systems Networking | Jun 21, 1998 3:43 pm | |
| Mike Smith | Jun 21, 1998 9:32 pm | |
| Castor Fu | Jun 21, 1998 10:50 pm | |
| Kenneth D. Merry | Jun 21, 1998 11:26 pm | |
| Gary Palmer | Jun 22, 1998 12:47 am | |
| Justin T. Gibbs | Jun 22, 1998 6:15 am | |
| Sean Witham | Jun 22, 1998 6:19 am |
| Subject: | Re: O/S Support for large [512Mb] PC systems | |
|---|---|---|
| From: | Brian Baird (br...@brig.com) | |
| Date: | Jun 19, 1998 4:40:50 am | |
| List: | org.freebsd.freebsd-hardware | |
1) Ideally I would like the 9Gb disks to have a single large filesystem + some swap. However I think the max size of a filesystem is limited to 2Gb - Is this still true ?
I've built large file servers using NetBSD for some years now. NetBSD has no problems with 9GB file systems (other than running fsck on them can take some time). You could even run ccd on a number of these drives to get a really massive filesystem. I have a NetBSD 1.2 based system with two Adaptec 2940 PCI controllers and 13 9GB Seagate Elite disks (and a 48GB DAT changer). It's been solid as a rock for several years.
2) Will 512Mb of memory break anything ? (I know I will have to tell the kernel the true memory size)
Recent (1.3 or later) versions of NetBSD correctly autodetect how much memory is in your machine. In earlier versions you had to config a special kernel to tell it if you had more than 64MB of memory. I've had lots of NetBSD machines with 256MB of memory. I've never gone to 512MB because I've never needed to for the applications I was running. You'll probably want to config a kernel that tunes NMBCLUSTERS to 2048 (for a busy network server) and NBUF and BUFPAGES so that they use more than 10% of memory.
3) Has anyone any experience of a machine with this sort of configuration ?
See above :-)
4) Has anyone used any of the Supermicro boards e.g. P6DBS with the builtin Adaptec Dual Channel UWSCSI ? or got suggestions for other suitable motherboards (preferably ones with will take up to 1Gb RAM) I should point out that 'the management' would REALLY like to use a commercially available box rather than me build one out of bits !
I've always stuck with Asus or Tyan motherboards with PCI card SCSI controllers. I think some of the earlier on-board SCSI controllers were less capable than the PCI cards (due to fewer SCBs? my memory is kind of fuzzy about this).
I have little experience with FreeBSD, but I'm sure it's capable as well. Just read ftp://ftp.cdrom.com/archive-info/wcarchive.txt for a description of a monster machine.
-- Brian Baird Brig Systems, Pleasanton CA br...@brig.com +1 925 484 2457
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