Am Mittwoch 11 Juli 2007 10:01 schrieb Alexander Skwar:
> Hello.
>
> Yesterday, I installed gentoo-sources-2.6.22. When I now boot this new
> kernel, I notice that all of a sudden my SATA disk is addressed with
> /dev/hda, whereas it used to be addressed with /dev/sda in 2.6.21. Why's
> that?
>
> But much more important: The IDE performance is now extremely bad.
>
> ,----[ hdparm -tT /dev/hda, kernel 2.6.22 ]
>
> | /dev/hda:
> | Timing cached reads: 2414 MB in 2.00 seconds = 1208.28 MB/sec
> | Timing buffered disk reads: 8 MB in 3.99 seconds = 2.00 MB/sec
>
> `----
>
> With 2.6.21, it's A LOT faster:
>
> ,----[ hdparm -tT /dev/sda, kernel 2.6.21 ]
>
> | /dev/sda:
> | Timing cached reads: 2414 MB in 2.00 seconds = 1207.80 MB/sec
> | Timing buffered disk reads: 150 MB in 3.01 seconds = 49.76 MB/sec
>
> `----
>
> The drive is (is?) running with udma5 in both cases, according to
> hdparm:
>
> ,----[ hdparm -Him /dev/sda, kernel 2.6.21 ]
>
> | /dev/sda:
> | drive temperature (celsius) is: 42
> | drive temperature in range: yes
> | HDIO_GET_MULTCOUNT failed: Inappropriate ioctl for device
> |
> | Model=Hitachi HTS721010G9SA00 , FwRev=MCZOC10H,
> | SerialNo= MPCZN7Y0H7E5VL Config={ HardSect NotMFM HdSw>15uSec Fixed
> | DTR>10Mbs }
> | RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
> | BuffType=DualPortCache, BuffSize=7538kB, MaxMultSect=16, MultSect=?8?
> | CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=195371568
> | IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
> | PIO modes: pio0 pio1 pio2 pio3 pio4
> | DMA modes: mdma0 mdma1 mdma2
> | UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
> | AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
> | Drive conforms to: ATA/ATAPI-7 T13 1532D revision 1:
> | ATA/ATAPI-2,3,4,5,6,7
> |
> | * signifies the current active mode
>
> `----
>
> ,----[ hdparm -Him /dev/hda, kernel 2.6.22 ]
>
> | /dev/hda:
> | drive temperature (celsius) is: 41
> | drive temperature in range: yes
> | multcount = 16 (on)
> |
> | Model=Hitachi HTS721010G9SA00, FwRev=MCZOC10H, SerialNo=MPCZN7Y0H7E5VL
> | Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> | RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
> | BuffType=DualPortCache, BuffSize=7538kB, MaxMultSect=16, MultSect=16
> | CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=195371568
> | IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
> | PIO modes: pio0 pio1 pio2 pio3 pio4
> | DMA modes: mdma0 mdma1 mdma2
> | UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
> | AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
> | Drive conforms to: ATA/ATAPI-7 T13 1532D revision 1:
> | ATA/ATAPI-2,3,4,5,6,7
> |
> | * signifies the current active mode
>
> `----
>
> What do I have to do, so that the drive is fast in kernel 2.6.22 as
> well?
>
> I'm booting the 2.6.22 kernel with this entry in grub menu.lst:
>
> ,----[ kernel 2.6.22 ]
>
> | title Gentoo GNU/Linux (zuletzt gebauter Kernel mit hda)
> | root (hd0,2)
> | kernel /vmlinuz root=/dev/hda6 lapic libata.atapi_enabled=1
> | combined_mode=libata
>
> `----
>
> Kernel 2.6.21 is started with the following entry in grub:
>
> ,----[ kernel 2.6.21 ]
>
> | title Gentoo GNU/Linux (vorletzter gebauter Kernel)
> | root (hd0,2)
> | kernel /vmlinuz.old root=/dev/sda6 lapic libata.atapi_enabled=1
> | combined_mode=libata
>
> `----I had the same problem on my laptop. You have to deactivate generic drivers in your kernel. (Stuff like Generic ATA Support)
pgpbamDVFEfjM.pgp
Description: PGP signature
