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Author Topic: OS4 and SFS (crash)  (Read 1247 times)

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Offline AMC258Topic starter

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OS4 and SFS (crash)
« on: March 02, 2008, 09:47:21 AM »
It used to be that if I did something that caused two programs to do lots of disk I/O at the same time, OS4 would deadlock.  If I ran two large ELFs at the same time it would happen every time.

Well, I ditched SFS for PFS, and the problem went away.  I've been running this way for quite some time now, and it hasn't happened once.

At the time I didn't even suspect SFS was the problem.  I just switched to PFS because SFS was trashing my data!
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Offline A4000_Mad

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Re: OS4 and SFS (crash)
« Reply #1 on: March 02, 2008, 09:54:27 AM »
8-) Have you got PFS3 on all partitions including your OS4 boot partition mate?
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Offline AMC258Topic starter

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Re: OS4 and SFS (crash)
« Reply #2 on: March 02, 2008, 09:59:42 AM »
All but two.  I have one that I don't use that is formatted with FFS.  The only reason it exists is I didn't need anymore 4G partitions, and that one takes up the remainder of the disk.
The other one, which the drive is currently turned off (noisy) still has SFS on it.  It's a large drive that has nothing but MP3s on it.  I never bothered to convert it because it's got well over 4G worth of stuff on it and it never gets written to (so SFS won't corrupt it).

Yes, the boot partition is PFS3.
The only drawback of using PFS3 under OS4 is that if you have partitions >4G, all kinds of bad things happen.
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Offline A4000_Mad

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Re: OS4 and SFS (crash)
« Reply #3 on: March 02, 2008, 10:24:35 AM »
Ok thanks :pint:

So far I've just been experimenting with OS4 using a few old 1GB, 2GB and 4GB IDE drives. But I've just found a 4GB Ultra Wide SCSI drive which should be much better and faster. I'll probably put PFS3 straight onto it in that case :-)

I guess the OS4 Boot-Floppy and OS4 CD with find an Ultra Wide SCSI drive on the PPC without problem?

(I plan for my CDrom to remain on the IDE lead for when I boot into other HDD's)
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Offline Framiga

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Re: OS4 and SFS (crash)
« Reply #4 on: March 02, 2008, 11:52:45 AM »
now many dosbuffers have you set for every SFS partitions?

Average suggested is 1000 dosbubbers every GB of partitions. I know sounds a lot but hey ... SFS requires it :-)

ah .. and to be sure that the dosbuffers are enough, run SFSQuery (after you have used the partition for some minutes) and look at how many caches have you missed

5/0.AOS4:C> SFSquery cdh6:
SFSquery information for cdh6: (SFS Version 1.279)
Start/end-offset : 0x00000000:2B0F3400 - 0x00000000:3FB79000 bytes
Device API       : (standard)
Bytes/block      : 512            Total blocks    : 676.910
Cache accesses   : 78.784         Cache misses    : 706 (0%)
Read-ahead cache : 4 x 1.024 bytes (Copyback)
Flush timeout    : act. 20s, inact. 0.5s
Max Name Length  : 107
DOS buffers      : 1.000
SFS settings     : [RECYCLED, 350 entries]

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