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- Path: news.mel.aone.net.au!usenet
- From: mpa@iig.com.au (Mark P Allen)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Proper mask, transfer rate, etc.
- Date: 13 Apr 1996 13:15:57 GMT
- Message-ID: <1658.6677T638T2771@iig.com.au>
- References: <4k1740$ddo@hobbes.compusult.nf.ca> <4k1lkb$a3j@freenet-news.carleton.ca>
- <2365.6671T6T1540@stud.uni-frankfurt.de> <dalec.06j5@zorro.amitrix.com>
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-
-
- On 12-Apr-96 14:06:32, Dale Currie wrote:
-
- I am no expert on this, but some thoughts come to mind...
-
- DC> You're correct about the value shown in the screen shot, it is a "c".
- DC> However, the default value in HDToolBox has always been 0x7ffffffe, up to
- DC> and including 3.1, AFAIK. That is just a couple of bytes shy of 2 Gigs,
- DC> which is the limit of the filesystems addressing. Anything larger is
- DC> invalid. The manual is obviously wrong, and anyway, I'd trust the
- DC> programmers before the manual writer anyday.
-
- The Warp Engine, by default, applies the following to a disk RDB:
-
- MaxTransfer: 2147483647
- Mask: 0xffffffff
-
- While the filesystem addressing is limited to 2GB, the actual device
- limitation is 4GB. I am using the above values on all my
- drives/partitions, including a 4GB partition for use with VLAB Motion
- (I'm glad to say the problems I was experiencing with VLAB, and we were
- discussing recently, appear to have been fixed by the warpram utility).
-
- DC> As a matter of interest, I once ran some DiskSpeed tests with both a "c"
- DC> and an "e" mask. The differences were so small as to be within the
- DC> variation in numbers between successive tests with no changes. However,
- DC> as usual, your mileage may vary, I'll stick with the default, it works.
-
- Someone told me that the "c", "e" and "f" symbols represented byte, word
- or long offsets (I'm getting way out of my depth here though) according to
- the host system (eg., 16 or 32-bit etc). (?)
-
- Regards,
-
- Mark
-
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