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From: dsking@pyr.gatech.EDU ( David King)
Newsgroups: comp.sys.amiga.tech
Subject: Re: FFS: The beating goes on...
Summary: OverDrive Users Support Group (LONG)
Keywords: ffs OverDrive MountList
Message-ID: <7086@pyr.gatech.EDU>
Date: 19 Jan 89 16:16:10 GMT
References: <695@ibmpa.UUCP>
Reply-To: dsking@pyr.UUCP ( David King)
Organization: Georgia Institute of Technology
Lines: 74

In article <695@ibmpa.UUCP> saare@ibmpa.UUCP (John Saare) writes:
...
>  The hardware:
>    A500
>    Pac. Periph. SubSystem 500
>    Pac. Periph. Overdrive host adapter
>    Micron 2MB 
>    Adaptec 4000A SCSI to ST-506 xlator.
>    2x70MB disks (ST-506)(Only 1 is relevant).
>  
>  The events:
[describes formating system w/ MaxTransfer={high value} and Mask=0x3fff* ]
>    - The system runs but disk xfer rates are very slow e.g. 27K/sec ala
>      diskperf.  Nothing I do improves disk performance.
...
>    - Has anybody experienced throughput problems with the Overdrive/Adaptec
>      4000a combo?  Any solutions? 

	I have had a problem similiar to this one.  Here's mine:
SYSTEM: Amiga B2000 4.1 revision
	Pacific Per. OverDrive controller
	Fuji 30 meg. SCSI disk

PROBLEMS: When I first brought up w3FFS{ I followed the instructions in the 
	1.3 manual which did not have the Mask parameter.  Found heavy data
	corruption.  Called up Pacific Per. They sent me the latest version 
	of the software.{ ~rI brought FFS up follwing that and had no 
	problems.  I noticed that it was slow, so I hunted down DiskPerf.
	Had the exact same problem (27,502 kbytes on all buffers).
	However, I have had no other problems with bad blocks.  In fact, I used 
	the slow FFS configuration for the past 3 months as I have tried 
	various solutions.  

So here's the question:  How many people have this problem?  What do we have 
	in common? Here's my mountlist:
----
/* OverDrive Drive definition */

/* FUJI  FK308S-39R */

DH1:   Device = overdrive.device
   Unit = 2
   Flags = 9
   Surfaces = 4
   BlocksPerTrack = 26
   Reserved = 2
   Interleave = 0
   LowCyl = 1  ;  HighCyl = 614
   Buffers = 5
   BufMemType = 3
/* The following are the OverDrive's parameters for the FastFileSystem */
/* CAUTION:: Refer to the Documentation before attempting to use */
/*           the OverDrive with the FastFileSystem. */
/* Comment ON */
   GlobVec = -1
   FileSystem = l:FastFileSystem
   Mount = 0
   Mask = 0x3fffff
   Stacksize = 0x800
   MaxTransfer = 127000
/*   Comment OFF */
#

>My thanks to anybody who slogged through this note.  Any and all (polite)
>suggestions will be appreciated.  -- John Saare (uunet!ibmsupt!saare)

Thanks for listening,
	David

-- 
 David King
Georgia Insitute of Technology, Atlanta Georgia, 30332
uucp: ...!{akgua,allegra,amd,hplabs,ihnp4,seismo,ut-ngp}!gatech!gitpyr!dsking
ARPA: dsking@pyr.gatech.edu