# hdparm -t -T /dev/hdc
/dev/hdc:
Timing buffer-cache reads: 32 MB in 10.30 seconds = 3.11 MB/sec
Timing buffered disk reads: 16 MB in 4.89 seconds = 3.27 MB/sec
Hmm.. suspicious results: probably not enough free memory for a proper
test.
% /usr/bin/time zcat linux-2.1.87.tar.gz>/dev/null
12.99user 2.46system 0:16.20elapsed 95%CPU (0avgtext+0avgdata
0maxresident)k
0inputs+0outputs (2666major+34minor)pagefaults 0swaps
% /usr/bin/time cat linux-2.1.87.tar>/dev/null
0.09user 11.36system 0:14.31elapsed 79%CPU (0avgtext+0avgdata
0maxresident)k
0inputs+0outputs (10859major+12minor)pagefaults 0swaps
% ls -l linux-2.1.87.tar*
-rw-r--r-- 1 root root 44165120 Feb 22 09:03 linux-2.1.87.tar
-rw-r--r-- 1 root root 10519265 Feb 17 01:58 linux-2.1.87.tar.gz
In this example it's a little slower with compression, but nonetheless I
still use it. This isn't (just) because I'm crazy, but because more data
(in this example, 4.2 times as much) will fit on the hard drive when
compressed, and the hard drive is limited in size. Things that don't fit
could go to several places, all much slower:
SCSI hard drive, about 700 kB/s
CD-RW, 345 kB/s
DAT tape, 172 kB/s
Ethernet, 60 kB/s
floppy, 36 kB/s
modem, 2.8 kB/s on a good day
___
Trevor Johnson
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