file system settings

[JuDi_4]

Good day!

What are the difference between:
f_bsize
f_frsize
PE Size
stripe size
stripe block size.

What parametrs are important for SAP, oracle?

[Jeeshan]

PE Size - Size of each physical extent.
f_bsize - represents the primary block size
f_frsize - represents the fragment size for files
stripe size - This term refers to the size of the stripes written to each disk.
stripe block size - refers to the aize of block size used in stripe

actually the f-bsize is important for oracle or SAP.

[JuDi_4]

What are the difference?

for example:
I have SAN disk MSA1000, RAID5, stripe size 64k.
PE Size 32M
f_frsize: 1024
f_bsize: 8192

What for so much parametres?

http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1225523971673+28353475&threadId=106672
In this thread say:
"f_frsize is your os block size"

I confused.

[Johnson Punniyalingam]

f_bsize is a "preferred file system block size"
whereas f_frsize is the "fundamental file system block size"

Thanks,
Johnson