Bug 56575 - harddisks configuration limited to disks
harddisks configuration limited to disks
Product: Red Hat Linux
Classification: Retired
Component: initscripts (Show other bugs)
i386 Linux
high Severity high
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Assigned To: Bill Nottingham
Brock Organ
Depends On:
  Show dependency treegraph
Reported: 2001-11-21 03:38 EST by Neil Darlow
Modified: 2014-03-16 22:24 EDT (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2002-01-25 04:19:30 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Neil Darlow 2001-11-21 03:38:48 EST
Description of Problem:
The use of /etc/sysconfig/harddisk(s|hd?) is limited to media type "disk"

Version-Release number of selected component (if applicable):

How Reproducible:
Design problem

Steps to Reproduce:

Actual Results:

Expected Results:

Additional Information:
I have found it necessary to disable DMA on other IDE devices e.g. CDROM
or TAPE drive and the check for media type "disk" defeats this.
Either the media type needs extending to "cdrom" and "tape" also or media
check needs removing altogether.
The only solution at present is to put hdparm lines in /etc/rc.local which
rather defeats the purpose of these override files.
Comment 1 Bill Nottingham 2001-11-28 01:16:36 EST
Arjan: isn't DMA disabling on CD-ROM/tape being done automatically?
Comment 2 Neil Darlow 2001-11-28 03:03:45 EST
Apparently not.

I've used hdparm /dev/hdb and hdparm /dev/hdd to report the configuration of 
my IDE CDROM and HP Colorado Tape drive respectively and they both say that 
DMA is enabled.

I've experienced problems with the IDE CDROM returning busy statuses and being 
reset and the ide-tape module behaves badly if DMA is enabled (the tape drive 
isn't DMA capable anyway).

With these sorts of things happening I think a simple method of tuning the 
parameters is needed.
Comment 3 Arjan van de Ven 2001-11-28 03:44:26 EST
DMA is only off for cdroms in the installer kernel.
Most cdrom drives are fine with dma, only a small number (well, 20% or so) is
actually broken (they advertise DMA capability to the kernel but don't actually
support it). Most of those are already on the blacklist and DMA is off for
those; it appears that your drive isn't on the blacklist yet....

For tapes it depends on the chipset it appears; we know of 1 specific problem so
far with a serverworks chipset vs a seagate tapedrive...
Comment 4 Neil Darlow 2001-11-28 05:18:23 EST
If it's of any use the hdparm -I output for my CDROM and Tape drives follows. 
I think the CDROM drive manufacturer is Delta and the Tape drive is an HP 
Colorado 8GB.

 Model=TAPA I84 XDCOR M                        , FwRev=EV-R.303, 
SerialNo=84CXRDMOV re.303
 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=yes, tPIO={min:227,w/IORDY:120}, tDMA={min:120,rec:150}
 PIO modes: pio0 pio1 pio2 pio3 pio4
 DMA modes: *mdma0 mdma1 mdma2 *udma0 udma1 udma2

 Model=PH      OCOLAROD8 BG                    , FwRev=.2600020, 
 Config={ SpinMotCtl Removeable DTR<=5Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes: pio0 pio1 pio2 pio3 pio4
 DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2

Comment 5 Arjan van de Ven 2002-01-25 04:19:25 EST
Either way, you can put hdparm -d 0 /dev/hdd in /etc/rc.local ....
Comment 6 Bill Nottingham 2002-04-14 22:34:02 EDT
This will be changed in 6.64-1; it will tweak non-disks, but only if there is an
/etc/sysconfig/harddisk<device> for that explicit device.
Comment 7 Curtis Doty 2002-04-22 13:41:25 EDT
Since 6.64 isn't public yet...

I know not the wisdom, but this simple patch allowed me to tweak cdrom in 

--- rc.sysinit-5.84.1-1 Fri Sep 21 08:58:58 2001
+++ rc.sysinit  Mon Jan 21 03:13:11 2002
@@ -350,7 +350,7 @@
         if [ -e "/proc/ide/${disk[$device]}/media" ] ; then
              hdmedia=`cat /proc/ide/${disk[$device]}/media`
-             if [ "$hdmedia" = "disk" ]; then
+             if [ "$hdmedia" = "disk" -o "$hdmedia" = "cdrom" ]; then
                   if [ -n "${HDFLAGS[$device]}" ]; then
                       action $"Setting hard drive parameters for ${disk
[$device]}: "  /sbin/hdparm ${HDFLAGS[$device]} /dev/${disk[$device]}

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