Re: FIFO

David Brown wrote:
> On Tue, Oct 04, 2005 at 05:23:58PM +0200, Joerg Schilling wrote:
> 
> Linux supports both types of block sizes.  'mt status' should tell
> you what the 'tape blocksize' is set to.  

drive type = Generic SCSI-2 tape
drive status = 1191182336
sense key error = 0
residue count = 0
file number = 0
block number = 0
Tape block size 0 bytes. Density code 0x47 (unknown).
Soft error count since last status=0
General status bits on (41010000):
 BOT ONLINE IM_REP_EN

> If it is set to a fixed
> number (usually 512), then everything is written in blocks of that
> size, and the block size on output is arbitrary.

Looks like it is not fixed.

> If the blocksize is zero, then the tape driver uses the blocks that
> are written.

I commit:

dd if=/dev/st0 of=testblocksize.dd bs=10M count=1
ls -l testblocksize.dd

size is 8388608 bytes.
Looks like bs=8m works as expected.

>    mt setblk 0
> 
> will give you the conventional blocks size.

I commit mt setblk 0 just before executing star -c.
If I understand you right, I should avoid setblk in my case.

Zoran