open suse => slow cd-drive

ungua · 11-28-2005, 11:05 AM

i installed open suse today* and am very, very satisfied until now. just one problem quite disturbing since i copy my backups back on disc: the cd-drives response is very bad. for a 54mb folder it first said "66 days left"

but the cd-drive starts to work after maybe 20-30 seconds. at some occasions copying one full cd took 15 minutes. how do i fix that problem?

CDRW: LG GCE-8481B-R 48x24x48, Retail

best regards
ungua

Keruskerfuerst · 11-28-2005, 12:08 PM

on console: su
hdparm /dev/"your cdrom"
and check if DMA is enabled.

ungua · 11-28-2005, 04:11 PM

refreshing the workplace, konqueror crashed for the first time after the new installation. motivating...

is there another way to check if dma is activated? this is my console results:

Code:

oli@linux:~> su hdparm /dev/hdc
su: user hdparm nonexistant
oli@linux:~> su oli /dev/hdc
Password:
bash: /dev/hcd: file or folder not found
oli@linux:~> hdparm /dev/hdc
bash: hdparm: command not found

regards
ungua

Keruskerfuerst · 11-29-2005, 09:40 AM

find out which device is your cdrom unit:
have a look at /var/log/boot.msg. You can also type dmsg on console.

on console:
su (hit enter)
then there occurs "passwd": (enter the password for "root")

hdparm /dev/hda (if cdrom is hda)
hdparm /dev/hdc (if cdrom is hdc) and so on

ungua · 12-01-2005, 05:30 AM

thank you for another answer!

in boot.msg i found that:

Code:

<6>VP_IDE: VIA vt8235 (rev 00) IDE UDMA133 controller on pci0000:00:11.1
<6>    ide0: BM-DMA at 0xe400-0xe407, BIOS settings: hda:DMA, hdb:pio
<6>    ide1: BM-DMA at 0xe408-0xe40f, BIOS settings: hdc:DMA, hdd:pio

so i was unsure whether hda or hdc was my cd-drive. i tried "dsmg":

Code:

oli@linux:~> dmsg
bash: dmsg: command not found

okay, so i did it the other way and there was some data, i assume, hda is my cd-drive?:

Code:

oli@linux:~> su
Password:
linux:/home/oli # hdparm /dev/hdc

/dev/hdc:
 IO_support   =  1 (32-bit)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument

/dev/hda:
 multcount    = 16 (on)
 IO_support   =  1 (32-bit)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 65535/16/63, sectors = 78165360, start = 0

ungua

Keruskerfuerst · 12-01-2005, 06:10 AM

Your HDD is /dev/hda and /dev/hdc is yor cdrom drive.

DMA is turned on for /dev/hdc.

Did you have a look in /var/log/warn for errors which belong to the cdrom drive.