Hi James,
here is an extract from "Device Drivers and Installation Commands, July 31,
2002, Linux Kernel 2.4"
==============
The DASD device driver is capable of accessing an arbitrary number of
devices.
The default major number for DASD (94) can only address 64 DASD (see below
for
details), so additional major numbers (typically descending from 254) are
allocated
dynamically at initialization or run time. The only practical limit to the
number of
DASD accessible is the range of major numbers available in the dynamic
allocation
pool.
.........
<SNIP>
.........
A Linux 2.2 or 2.4 system is restricted to 256 major device numbers, each
holding
64 blocks of 4 minor numbers, giving a maximum of 16,384 DASD even if no
numbers are used for other types of device. Every major number used for
other
devices reduces the maximum number of DASD by 64.
==============
the same information can be found in the correspondig document for kernel
2.2.
Regards
Udo Beckmann
HSBC Trinkaus & Burkhardt KGaA
IT Zentrale Handelssysteme
K�nigsallee 21-23
40212 D�sseldorf
Tel: +49/211/910-2892
Fax: +49/211/910-3764
James Johnson
<[EMAIL PROTECTED] An: [EMAIL PROTECTED]
u.edu> Kopie:
Gesendet von: Blindkopie:
Linux on 390 Port Thema: Max number of dasd devices
<[EMAIL PROTECTED]
IST.EDU>
Fax-Deckblatt:
HSBCTuB
10.10.2002 19:16
Bitte antworten
an Linux on 390
Port
Is there a max number of dasd devices that can be attached to a Linux
machine?
James Johnson Email: [EMAIL PROTECTED]
Systems Programmer Voice: 660-543-8065
Central Missouri State University Fax: 660-543-8123
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