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- Path: grafix.xs4all.nl!john.hendrikx
- Date: Wed, 14 Feb 96 01:52:37 GMT+1
- Newsgroups: comp.sys.amiga.misc
- Distribution: world
- Subject: Re: 9GB SCSI II Controller Card for th
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- From: john.hendrikx@grafix.xs4all.nl (John Hendrikx)
- Message-ID: <john.hendrikx.4ebn@grafix.xs4all.nl>
- Organization: Grafix Attack BBS Holland
-
- 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.
-
- Grtz John
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