diff options
Diffstat (limited to 'Documentation/ide/ide.txt')
| -rw-r--r-- | Documentation/ide/ide.txt | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/Documentation/ide/ide.txt b/Documentation/ide/ide.txt index 5bff93c89a23..caf24b21e7f5 100644 --- a/Documentation/ide/ide.txt +++ b/Documentation/ide/ide.txt @@ -82,17 +82,16 @@ Drives are normally found by auto-probing and/or examining the CMOS/BIOS data. For really weird situations, the apparent (fdisk) geometry can also be specified on the kernel "command line" using LILO. The format of such lines is: - hdx=cyls,heads,sects -or hdx=cdrom + ide_core.chs=[interface_number.device_number]:cyls,heads,sects +or ide_core.cdrom=[interface_number.device_number] -where hdx can be any of hda through hdh, Three values are required -(cyls,heads,sects). For example: +For example: - hdc=1050,32,64 hdd=cdrom + ide_core.chs=1.0:1050,32,64 ide_core.cdrom=1.1 -either {hda,hdb} or {hdc,hdd}. The results of successful auto-probing may -override the physical geometry/irq specified, though the "original" geometry -may be retained as the "logical" geometry for partitioning purposes (fdisk). +The results of successful auto-probing may override the physical geometry/irq +specified, though the "original" geometry may be retained as the "logical" +geometry for partitioning purposes (fdisk). If the auto-probing during boot time confuses a drive (ie. the drive works with hd.c but not with ide.c), then an command line option may be specified @@ -101,7 +100,7 @@ probe/identification sequence. For example: ide_core.noprobe=0.1 or - hdc=768,16,32 + ide_core.chs=1.0:768,16,32 ide_core.noprobe=1.0 Note that when only one IDE device is attached to an interface, it should be @@ -118,9 +117,9 @@ If for some reason your cdrom drive is *not* found at boot time, you can force the probe to look harder by supplying a kernel command line parameter via LILO, such as: - hdc=cdrom /* hdc = "master" on second interface */ + ide_core.cdrom=1.0 /* "master" on second interface (hdc) */ or - hdd=cdrom /* hdd = "slave" on second interface */ + ide_core.cdrom=1.1 /* "slave" on second interface (hdd) */ For example, a GW2000 system might have a hard drive on the primary interface (/dev/hda) and an IDE cdrom drive on the secondary interface @@ -182,12 +181,6 @@ driver using the "options=" keyword to insmod, while replacing any ',' with Summary of ide driver parameters for kernel command line -------------------------------------------------------- - "hdx=" is recognized for all "x" from "a" to "u", such as "hdc". - - "hdx=cdrom" : drive is present, and is a cdrom drive - - "hdx=cyl,head,sect" : disk drive is present, with specified geometry - "ide=doubler" : probe/support IDE doublers on Amiga There may be more options than shown -- use the source, Luke! @@ -230,6 +223,10 @@ Other kernel parameters for ide_core are: * "nowerr=[interface_number.device_number]" to ignore the WRERR_STAT bit +* "cdrom=[interface_number.device_number]" to force device as a CD-ROM + +* "chs=[interface_number.device_number]" to force device as a disk (using CHS) + ================================================================================ Some Terminology |