home *** CD-ROM | disk | FTP | other *** search
- Path: dispatch.news.demon.net!demon!redrobe.demon.co.uk
- From: Mike@Redrobe.demon.co.uk (Mike)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: 9GB SCSI II Controller Card for th
- Date: 16 Feb 96 18:14:51 +0000
- Message-ID: <1596.6620T1094T2565@Redrobe.demon.co.uk>
- References: <john.hendrikx.4ebn@grafix.xs4all.nl>
- NNTP-Posting-Host: redrobe.demon.co.uk
- X-NNTP-Posting-Host: redrobe.demon.co.uk
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
-
- Hi, John Hendrikx , on 14-Feb-96 01:52:37 you scribbled....
- >In a message of 10 Feb 96 Mike wrote to All:
-
- > >> The A3000 internal SCSI interface will handle 9GB (and larger) drives
- > >> with no problems at all.
-
- > >> The problem is that neither dos.library nor the filesystem can easily
- > >> deal with anything over 2GB. It doesn't matter *what* SCSI interface you
- > >> use, until the OS is updated, you're stuck.
-
- > M> does this mean you can't use disks >2GB or just that you can't have
- > M> partitions over 2GB ??
-
- >It depends on the device, but most of them can't handle anything over 2 GB
- >(not talking partitions here). The problem is that filesystems have to give
- >byte-offsets to the device which tells them where to start reading or
- >writing. This byte-offset is measured from the start of the disk, not the
- >start of the partition.
-
- >The only way to solve this is to create devices which have new commands to do
- >reading and writing which take block-offsets instead of byte-offsets (this
- >would also mean the filesystem needs to be slightly altered) or maybe even
- >64-bit byte-offsets. Another solution would be to let the filesystem use
- >SCSI-commands directly. I believe AFS can do this, but I'm not sure.
- ^^^^^^^^^^^^^
- Ah yes...I do remember people talking about a new version of AFS that has
- "SCSI-direct"...now I know what they were on about...:)
-
-
-
- Mike
-
- --
- ---------------------------------------------------------------------------
- Mike Redrobe - Mike@Redrobe.demon.co.uk MikeRR on #Amiga
- ---------------------------------------------------------------------------
-
-