Thank you. I'll try it out. One question though. How do i modify the loader.conf on the usb image from which i am booting? Is there somethign i can change in the boot loader? If this is RTFM kindly point me to it.
On Sun, Aug 12, 2012 at 11:45 AM, Ian Lepore <free...@damnhippie.dyndns.org>wrote: > On Sun, 2012-08-12 at 10:57 -0400, Wajih Ahmed wrote: > > I have a Dell D420 laptop with the ZIF interface and uses a 1.8" PATA > > drive. I purchased a Kingspec 16GB SSD and installed it. The BIOS > > recogonizes the drive. I am using the USB image to boot in verbose mode. > > Upon boot the disk is recognized by FreeBSD 9.0 as follows (sorry for any > > typos as i am reading this off the console): > > > > ada0 at ata0 bus 0 scbus0 target 0 lun 0 > > ada0: <KingSpec KSD-ZF18.6-016MS 20120202> ATA-7 device > > ada0: Serial number... > > ada0: 100.0000MB/s transfers (UDMA5, PIO 512bytes) > > > > Then i see these errors > > > > (ada0:ata0:0:0:0): ATA status error > > .....READ_DMA. ACB: c8 .... > > .....CAM status: ATA status error > > .....ATA status: 51 (DRDY SERV ERR), error: 84 (ICRC ABRT) > > .....RES: 51 ..... > > > > > > As a result the disk is rendered unusable and i cannot write (partition) > to > > it. I did test the drive with a linux boot disk and i was able to format > > it. > > > > So my question is how can i make this drive work? Do i need to pass > > something to the kernel at boot to lower the speed of the drive. Maybe > to > > UDMA66? Any help will be really appreciated. > > Whenever I've seen ICRC errors, it has been caused by using a 40-wire > cable at speeds faster than UDMA33 [1]. A potential fix is to force the > mode in loader.conf: > > hint.ata.0.mode="UDMA33" > > [1] I've also seen ICRC errors when there was no cable involved at all, > such as with a surface-mount compact flash socket on a circuit board > that has 50 pins spaced even closer together than a standard ata cable. > I have no real proof that such closely-spaced pins cause the same kind > of signal crosstalk as a 40-wire cable (they're close, but the length of > the parallel wires is just a couple millimeters), but forcing the driver > to UDMA33 or less always seems to fix the problem. > > -- Ian > > > _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
