freebsd: ad0s3a failure (fwd)

[Giorgos Keramidas]

>   ---------- Forwarded message ----------
>   Date: Thu, 30 Mar 2006 12:08:20 +0100 (BST)
>   From: Αθανάσιος Ψωρομύτης <thanps5 at yahoo.gr>
>   To: unix-admin-gr at lists.hellug.gr
>   Subject: freebsd: ad0s3a failure
>
>   Exo egkatastisi freebsd 6.0 kai exo to eksis provlima... otan
>   fortoni to pc mou parousiazontai ta parakato minimata
>
>   ad0:WARNING-READ_DMA UDMA ICRC error (retrying request) LBA=0
>   ad0:FAILURE-READ_DMA status=51<READY,DSC,ERROR> error=84<ICRC,ABORTED> LBA=0
>
>   kai meta
>
>   trying mount root from ufs:ad0s3a
>
>   pio einai to provlima? ftaiei kati me to partition table?
>   simioteo pos se asfali litourgia bootarei kanonika. Episis to
>   idio provlima ixa kai kata tin egkatastasi tin opia katafera
>   na telioso epitixos episis me asfali litourgia....
>
>   ti exo kani lathos??????

Otan blepeis tetoia mhnymata apo ton ATA driver tou FreeBSD, kai
se `safe-mode' paizei swsta, tote kati den paei kala me ena apo
ta ekshs pragmata:

    * Ta kalwdia pou xrhsimopoieis den einai swsta balmena

    * Ta kalwdia pou exeis den einai DMA-capable 80-pin typoy

Auto poy ginetai otan kaneis boot se `safe-mode' einai oti ta
kernel tunables:

	hw.ata.ata_dma
	hw.ata.atapi_dma

pairnoun aytomata apo to boot loader thn timh "0", to ACPI
apenergopoieitai, kai kapoia alla mh endiaferonta ayth th stigmh
pragmata.

To idio pragma mporeis na kaneis esy bgainontas se `boot loader
prompt' kai dinontas sto "OK" prompt tis entoles:

	OK set hw.ata.ata_dma="0"
	OK set hw.ata.atapi_dma="0"

H prwth apenergopoiei to DMA gia tous ATA diskous.  H deyterh gia
ta ATAPI CD-ROMs.

Enallaktika, kane boot me to boot loader pali se `safe-mode' kai
des gia poia apo tis ad* syskeyes soy paraponietai o pyrhnas, kai
ti akribws leei otan tis anakalyptei.  Sthn anagkh, an de bgaleis
akrh, steile mou to output ths `dmesg' kai tha sou pw an dw kati
periergo ekei pera...

- Giorgos