Mustafa Gultekin's Tips

Some clarifications on performance boosting:

If you have more than 6 megabytes of RAM, OS/2 in general works better with HPFS file system. With proper cache size you increase the performance by 150% over FAT file system for I/O intensive applications - also for loading programs etc. If the hard disk is formatted as HPFS OS/2 will put in your CONFIG.SYS: IFS=C:›OS2›HPFS.IFS /CACHE:nnn /CRECL:4 /AUTOCHECK:C assuming your drive is "C". nnn is the cache size. Default is about 5% of total RAM memory. for 8M system it should be around 384 but no more than 512. for 16M, I am using 1024 (1M). I don't think that more than 1.5M helps at all. AUTOCHECK:C tells OS/2 to run CHKDSK on drive C before the Work shell is loaded.(You cannot run CHKDSK from the desktop. It will tell you that the file system is bad etc.) Errors will be corrected at this time. Errors usually caused by programs terminating with files open or turning the system off without "shutdown" procedure. You can add other drives as well i.e. Autocheck:CD etc. run=c:›os2›cache.exe /lazy=on will start the HPFS caching. It is active cache both read & write lazy=on ===> data etc. written to disk when CPU is idle. you can increase it depending on how frequent etc. but defaults seems to be OK. DISKCACHE=nnn,LW is for FAT file system only. If you have all HPFS system delete it from config.sys. Caching floppies will not help. nnn is the size. LW is for Lazy Write.
 * FILES=nn is good only for DOS programs. If you are using Windows under OS/2 bump it to 60. Else make it ????.
 * BUFFERS=50 For OS/2. I found 50 to work better than the default (30).
 * MENMAN=SWAP,PROTECT this is the default with OS/2 2.0. Leave it as it is.
 * For those using HPFS I strongly recommend disk utilities by GammaTech, Inc (405) 359-1219. Similar to Norton for DOS. Has a lot of nice features & only reliable way to recover files etc. Excellent user support (I can vouch for that). 32 bit version is beta test & should be out soon.

Cheers, Mustafa Gultekin
 * PS: OS/2 2.0 can address 4G in Virtual but SAS running under OS/2 2.0 can "only" address 1G in Virtual, that will change with SAS 6.08.