Arturo Alejandro Hoffstadt Urrutia wrote:
Hello:
I have a Lenovo/IBM Thinkpad R52. It is a Celeron 1.4 Ghz, 256 RAM, Intel 915
video, sata hdd 40 GB, DVD-CDRW, etc.
The thing, is that when I transfer files from the/to the CDrom, the whole
system (even the mouse) gets really slow.
This is the model of my sata controller reporte by lspci:
Intel Corporation 82801FBM (ICH6M) SATA Controller (rev 03)
Another thing, is that the hdparm program, can't change the UDMA settings. It
says that my drives doesn't have udma, but it really has.
[root@localhost ~]# hdparm -c /dev/sda
/dev/sda:
IO_support = 0 (default 16-bit)
[root@localhost ~]# hdparm -c1 /dev/sda
/dev/sda:
setting 32-bit IO_support flag to 1
HDIO_SET_32BIT failed: Invalid argument
IO_support = 0 (default 16-bit)
Also, when the system start using swap, it start to slow (a lot, but not as
much as when I read/write from/to the CDrom).
This is the list of the modules I found relevant from lsmod:
i2c_i801 11853 0
i2c_core 25537 2 i2c_ec,i2c_i801
ide_cd 42337 2
cdrom 38625 1 ide_cd
ahci 23365 0
ata_piix 17993 3
libata 102745 2 ahci,ata_piix
sd_mod 24897 20
scsi_mod 138601 4 sg,ahci,libata,sd_mod
ext3 135497 1
jbd 63081 1 ext3
ehci_hcd 35533 0
ohci_hcd 25181 0
uhci_hcd 27725 0
I hope someone can help me... I couln't find the problem...
See ya!
PS: I will send transfers rates under determined actions later...
Maybe the SATA driver for this chipset is know to have bugs with DMA (or
when CDROMs are attached to it) and disabled them by default?
But i'm not a kernel expert, so someone with more and deeper knowledge
of the drivers would have to comment on that.
Have you tried running the laptop without the CDROM, just in case?
Read ya, Phil
--
Philipp Knirsch | Tel.: +49-711-96437-470
Development | Fax.: +49-711-96437-111
Red Hat GmbH | Email: Phil Knirsch <phil@xxxxxxxxx>
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