patch-1.3.22 linux/drivers/block/README.ide
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- Lines: 109
- Date:
Thu Aug 31 08:09:07 1995
- Orig file:
v1.3.21/linux/drivers/block/README.ide
- Orig date:
Mon Aug 28 14:52:18 1995
diff -u --recursive --new-file v1.3.21/linux/drivers/block/README.ide linux/drivers/block/README.ide
@@ -27,28 +27,31 @@
- support for interrupt unmasking during I/O (better than hd.c)
- improved handshaking and error detection/recovery
- can co-exist with hd.c controlling the first interface
- - support for reliable operation of buggy CMD-640 interfaces
-NEW! - use kernel command line option: ide1=serialize
- - experimental support for DTC-2278D interfaces
-NEW! - use kernel command line option: ide1=dtc2278
- run-time selectable 32bit interface support (using hdparm-2.3)
-
+NEW! - support for reliable operation of buggy RZ1000 interfaces
+NEW! - PCI support is automatic
+NEW! - support for reliable operation of buggy CMD-640 interfaces
+NEW! - PCI support is automatic
+NEW! - for VLB, use kernel command line option: ide0=cmd640_vlb
+NEW! - this support also enables the secondary i/f on most cards
+NEW! - support for secondary interface on the FGI/Holtek HT-6560B VLB i/f
+NEW! - use kernel command line option: ide1=ht6560
+NEW! - experimental support for DTC-2278D interfaces
+NEW! - use kernel command line option: ide1=dtc2278
NEW! - support for drives with a stuck WRERR_STAT bit
NEW! - support for removeable devices, including door lock/unlock
-
NEW! - transparent support for DiskManager 6.0x and "Dynamic Disk Overlay"
+NEW! - works with Linux fdisk, LILO, loadlin, bootln, etc..
NEW! - should work for for EZ-Drive disks as well (not verified)
- - works with Linux fdisk, LILO, loadlin, bootln, etc..
NEW! - ide-cd.c now compiles separate from ide.c
NEW! - Bus-Master DMA support for Intel PCI Triton chipset IDE interfaces
- - for details, see comments at top of triton.c
+NEW! - for details, see comments at top of triton.c
For work in progress, see the comments in ide.c, ide-cd.c, and triton.c.
-***
-*** IMPORTANT NOTICES:
-*** ==================
-***
+
+*** IMPORTANT NOTICES (for kernel versions prior to 1.3.22)
+*** =================
*** "CMD" EIDE Interfaces will not (by default) work *reliably* when drives
*** are attached to the second interface. This is due to a flaw in the
*** hardware. To "fix" this, supply the special kernel "command line"
@@ -63,7 +66,21 @@
*** and is only a problem when "hdparm -u1" is used after booting.
***
*** Failure to abide by these restrictions can cause severe data corruption!
+
+
+*** IMPORTANT NOTICES (for kernel versions after 1.3.21)
+*** =================
+*** PCI versions of the CMD640 and RZ1000 interfaces are now detected
+*** automatically at startup when PCI BIOS support is configured.
+*** Linux disables the "pre-fetch" or "read-ahead" modes of these interfaces
+*** to prevent data corruption possible due to hardware design flaws.
+*** Use of the "serialize" option is no longer necessary.
***
+*** The CMD640 is also used on some Vesa Local Bus (VLB) cards, and is *NOT*
+*** automatically detected by Linux. For safe, reliable operation with such
+*** interfaces, one *MUST* use the "ide0=cmd640_vlb" kernel option.
+*** Use of the "serialize" option is no longer necessary.
+
To access devices on the 2nd/3rd/4th interfaces, device entries must first be
created in /dev for them. To create such entries, simply run the included
@@ -184,6 +201,9 @@
"idex=dtc2278" : look for and try to initialize a dtc2278
"idex=serialize" : do not overlap operations on ide0 and ide1.
+ "idex=ht6560b" : enables use of HT6560B secondary i/f
+ "idex=cmd640_vlb" : required for VLB cards with the CMD640 chip
+ (not for PCI versions)
Everything else is rejected with a "BAD OPTION" message.
@@ -374,3 +394,32 @@
Vladimir Myslik
+comp.sys.intel #41571 (1 + 2 more) --(1)--(1)+-(1)--(1)
+From: [email protected] (Chuck Tribolet) \-(1)--(1)--(1)--(1)
+Newsgroups: comp.sys.intel,comp.os.os2.bugs
+[1] Re: RZ1000 errorIntel motherboards and RZ1000
+Date: Tue Aug 29 11:00:12 EDT 1995
+Organization: IBM Almaden Research Center
+Lines: 20
+X-Newsreader: IBM NewsReader/2 v1.02
+
+In <[email protected]>, Terry Lambert <[email protected]> writes:
+>Try running a real OS. BIOS drivers so not initiate bus mastering
+>DMA, and DOS does not interleave I/O.
+
+1: The RZ1000 can't do DMA.
+2: I was running OS/2 (2.11 back then).
+
+I agreed that you might be able to concoct a benchmark that was affected,
+but it has had no real world effect for me or a lot of other people. Disabling
+IDE prefetch has the effect of a small increase in PCI bus busy at a time
+when the CPU is giving all it's CPU cycles to the IDE driver (because the
+RZ1000 can't run DMA and the driver has to be in a PIO loop) and therefore
+the CPU can't do much of anything else anyway.
+
+
+Chuck Tribolet
[email protected]
+San Jose, CA
+
+Silicon Valley - best day job in the world
FUNET's LINUX-ADM group, [email protected]
TCL-scripts by Sam Shen, [email protected]
with Sam's (original) version of this