X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=Documentation%2Ffilesystems%2Fdevfs%2FREADME;h=54366ecc241fee30aaf1a77ec91b15c310b766a3;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=3ef85826645009576356380272ae85e4fe8afabd;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git diff --git a/Documentation/filesystems/devfs/README b/Documentation/filesystems/devfs/README index 3ef858266..54366ecc2 100644 --- a/Documentation/filesystems/devfs/README +++ b/Documentation/filesystems/devfs/README @@ -1349,47 +1349,6 @@ This will cause devfsd to create (and destroy) symbolic links which point to the kernel-supplied names. -SCSI Host Probing Issues - -Devfs allows you to identify SCSI discs based in part on SCSI host -numbers. If you have only one SCSI host (card) in your computer, then -clearly it will be given host number 0. Life is not always that easy -is you have multiple SCSI hosts. Unfortunately, it can sometimes be -difficult to guess what the probing order of SCSI hosts is. You need -to know the probe order before you can use device names. To make this -easy, there is a kernel boot parameter called "scsihosts". This allows -you to specify the probe order for different types of SCSI hosts. The -syntax of this parameter is: - -scsihosts=:::...: - -where ,,..., are the names -of drivers used in the /proc filesystem. For example: - - scsihosts=aha1542:ppa:aha1542::ncr53c7xx - - -means that devices connected to - -- first aha1542 controller - will be /dev/scsi/host0/bus#/target#/lun# -- first parallel port ZIP - will be /dev/scsi/host1/bus#/target#/lun# -- second aha1542 controller - will be /dev/scsi/host2/bus#/target#/lun# -- first NCR53C7xx controller - will be /dev/scsi/host4/bus#/target#/lun# -- any extra controller - will be /dev/scsi/host5/bus#/target#/lun#, - /dev/scsi/host6/bus#/target#/lun#, etc -- if any of above controllers will not be found - the reserved names will - not be used by any other device. -- /dev/scsi/host3/bus#/target#/lun# names will never be used - - -You can use ',' instead of ':' as the separator character if you -wish. I have used the devfsd naming scheme -here. - -Note that this scheme does not address the SCSI host order if you have -multiple cards of the same type (such as NCR53c8xx). In this case you -need to use the driver-specific boot parameters to control this. - ----------------------------------------------------------------------------- @@ -1952,12 +1911,6 @@ explores the SCSI subsystem and how it interacts with devfs Douglas Gilbert has written another useful document at -http://www.torque.net/scsi/scsihosts.html which -discusses the scsihosts= boot option - - -Douglas Gilbert has written yet another useful document at - http://www.torque.net/scsi/SCSI-2.4-HOWTO/ which discusses the Linux SCSI subsystem in 2.4.