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- Path: enea.se!not-for-mail
- From: olli@enea.se (Ola Liljedahl)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Iomega ZIP drive and AFS
- Date: 16 Mar 1996 13:22:44 +0100
- Organization: Enea OSE Systems AB; "OSE - Design on a higher level"
- Message-ID: <4iebqk$b9o@gordon.enea.se>
- References: <4ha8n7$8u2@sdaw04.seinf.abb.se> <3149D6B6.44A1@pop.gpnet.it>
- NNTP-Posting-Host: gordon.enea.se
-
- Mark Marin <megavolt@pop.gpnet.it> wrote:
- > What I am dying to know, how much faster is it with AFS? I am thinking
- > about getting it, but don't know what speed increase I will get on my
- > SCSI II drive (which is fast as it is). Also, can you set up your boot
- > drive with AFS? If it's not already booted, how can it read the drivers
- > or whatever off the boot partition? Can you use it for floppies too? How
- > fast are they? Can an AFS partition be used for Emplant Mac partitions
- > (Pseudo Mac drive from FFS is how most of us set it up).
-
- 1: speed increase
- With my A3000 and Maxtor 1/2 gig SCSI-II drive AFS is 30-40% faster
- when reading files. As the chunk size (the amount of data you read in
- one operation) increases AFS approaches the drive's physical limit
- (2.2M/s aynchronous, 3.7M/s synchronous) whereas FFS only reached maybe
- 70% of the physical limit (1.5M/s asynchronous). Also directory listings
- etc. are very fast, but it is hard to measure and DC-FFS was quite fast
- in these respects too. Currently there seem to be a few operations on
- AFS that are slow, fx adding a few bytes at a time to the end of a (log-)
- file is slow, however newer version of AFS will has special log file
- support 'rollover logfiles'.
-
- 2: boot partition
- I boot from an AFS partition.
- (almost) simple:
- a) Backup your boot partition.
- b) Enter HDToolBox.
- c) Install an AFS filesystem in the Rigid Disk Block (RDB).
- d) Choose the AFS dostype for the boot partition.
- e) Save changes. WARNING: this destroys the data in the changed partition.
- f) Exit HDToolBox.
- g) Format the boot partition. It is now a valid AFS volume.
- h) Restore the backup.
- Another WARNING: this is not the exact procedure, only a simplified
- example. Try to get some documentation for HDToolbox. It is also dangerous
- to (temporarily) destroy your boot partition, try to work against another
- partition, use it as your new boot partition. You could swap back later.
-
- 3: AFS Emplant Mac partitions
- No idea.
-
- Regards
-
- Ola Liljedahl
- olli@enea.se
- "OSE - Design on a higher level"
-