Messages in this thread |  | | From | (H. Peter Anvin) | Subject | Re: SCSI device numbering | Date | 3 Jul 1996 01:07:46 GMT |
| |
Followup to: <m0uakow-00020gC@kb5yvf.usl.edu> By author: jms@pobox.com (Johnie Stafford) In newsgroup: linux.dev.kernel > > ac> Purpose Bits Normal Extreme > ac> controller 4 <= 1 2 > ac> bus 4 == 0 1
Extreme known is 3, actually.
> ac> device 8 <= 2 4 > > What about wide SCSI? It does 16 devices.
Actually he is allowing up to 256 devices here (2^8). 3 bits would be normal, 4 wide, and SCSI-32 would require 5 bits.
> ac> lun 8 == 0 3 > ac> partition 4 <= 3 4
This is inadequate. The 4-bit partition limit in SCSI has shown too restrictive.
However, since Linus is suggesting using the major for the controller (a very good idea, IMHO) 12+20 should be enough. I still would prefer 32+32.
-hpa -- PGP public key available - finger hpa@zytor.com I don't work for Yggdrasil, but they sponsor the linux.* hierarchy. "The earth is but one country, and mankind its citizens." -- Bahá'u'lláh Just Say No to Morden * Save Babylon 5: http://www.babylon5.com/cmp/support/
|  |