RE: Fast random generator was: Re: Ideas for v2.1
2 Jul 96 11:12:31 -0500

I have a collection of very good, and fast, random number gererators. I
would be happy to make such a device, if it would be useful. But I don't
want to go do the work only to have it ignored because the current RNG's are
"good enough".


Ray Van Tassle

From: on Tue, Jul
2, 1996 9:25 AM
Subject: z-Fast random generator was: Re: Ideas for v2.1

Old-Subject: Fast random generator was: Re: Ideas for v2.1
Precedence: bulk


as I have problems with bad blocks on a harddisk, I find it usefull to write
random data to the disk to probe that. However the speed of /dev/urandom
doesn't match the write speed of modern harddisks at all:
elektron:/mnt1/home> time dd if=/dev/urandom of=/dev/null bs=1k count=1k
1024+0 records in
1024+0 records out
0.000u 4.040s 0:04.08 99.0% 0+0k 0+0io 42pf+0w
That's about 250 kByte/sec. This is with a Pentium 100

So I would like to see a fast (possibly much mor predictable) random
generator device (/dev/fandom), running with perhaps 5 MBytes/sec or better
above. Is that feasable?

Uwe Bonnes      

Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------