🚀 go-pugleaf

Flemming Steffensen said in comp.sys.amiga.applications on 01-Dec-96 08:47:17
 FS> Damien Groves wrote in comp.sys.amiga.tech about "re: filesystem block
 FS> sizes":

DG>> 1.8 A/V = AUDIO/VIDEO
DG>> means if you store either on your drive a larger block size gives you
DG>> less overhead= (Faster transfers) example- a 10meg file with 4096k block
DG>> size (either A/V) will in most cases give a sustained transfer rate thats
DG>> faster due to the system not having to deal with all the overhead of
DG>> finding and decoding 4 times the number sectors which you have with a
DG>> 512k size. for most people a smaller sector size gives more storage space
DG>> and faster file lookup

 FS> Please note that normal size is 512 bytes, not 512 kbytes.

 FS> The use of a bigger sectorsize has two sides.

 FS>    1) Faster access to the files contens.
 FS>    2) Every file will fill a given number of sectors.

 FS> Thus, if I had a sector size of 2048bytes, then I would use 106 kbyte for
 FS> the files in my s: directory (Provided they all are smaller then 2kbyte).
 FS> But if I had the sector size of 512, then my s: dir only tages about
 FS> 50 kbytes. This is because most of the files are more then 512 bytes, and
 FS> thus will have to fill two sectors.

 FS> Hope this is understandable.

A good compromise for me was to set my HD's partition to 1024 byte blocks.  This
is only about 10% slower than 2048 or 4096 (I didn't see more than a 2%
difference in speed between them) but is at least twice as fast for file
transfers.  The directory operations are slightly slower (about 5%, I think).

For general use, this works pretty good for me on this 1 gig Seagate.

Going to 1024 byte sectors on the Zip ups it's rate to 1.1 megs/sec for reads. 
That's almost full speed on it (I get 1.2-1.3 megs/sec raw read speed)!  With
512 byte sectors, it runs about 500-700 K/sec.  Only problem is AmiBack still
thinks it has 512 byte sectors, so I can only get 50 MB on a 100 MB disk.  I
ended up putting it back to 512 byte sectors so the backups work correctly.  I
think it's time I get a different backup program.


         Daniel J. Andrea II  <dandrea@mail.tfs.net> HAM Radio--KA0MVK
       Amiga 3000 '030 25MHz, 16 megs FastRAM on AmiFAST 3000, 1 gig HD
         Zip drive, AmigaDOS 3.1, and CyberVision 64 2 Meg video card
  Public PGP key available, Fingerprint = A452EF542E7FFD29 E58E374FFB7AA881

And now...
"I am Locutus of Borg
 Resistance is futile.
 Your life as it has been is over.
 From this time forward, you will service us."  Picard as Locutus