Date: Mon, 3 Mar 2003 15:31:20 +0100 (CET) From: Joost Bekkers <joost@bps.jodocus.org> To: FreeBSD-gnats-submit@FreeBSD.org Cc: Paul Toirkens <paul@toirkens.com> Subject: kern/48879: ATA disk size detected incorrectly (lba sector count not used on 30GB disk) Message-ID: <200303031431.h23EVKf32599@bps.jodocus.org>
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>Number: 48879
>Category: kern
>Synopsis: ATA disk size detected incorrectly (lba sector count not used on 30GB disk)
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Mar 03 06:40:03 PST 2003
>Closed-Date:
>Last-Modified:
>Originator: Joost Bekkers
>Release: FreeBSD 4.7-RELEASE i386
>Organization:
>Environment:
System: FreeBSD sapphire.toirkens.com 4.7-RELEASE FreeBSD 4.7-RELEASE #2: Sun Mar 2 20:50:23 CET 2003 root@sapphire.toirkens.com:/usr/src/sys/compile/SAPPHIRE i386
partial dmesg:
atapci0: <VIA 82C686 ATA100 controller> port 0xff00-0xff0f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
ahc0: <Adaptec 2940 Pro Ultra SCSI adapter> port 0xdc00-0xdcff mem 0xdffff000-0xdfffffff irq 10 at device 16.0 on pci0
aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs
ad0: 29311MB <Maxtor 53073U6> [59554/16/63] at ata0-master UDMA66
acd0: CDROM <> at ata1-master PIO4
Waiting 15 seconds for SCSI devices to settle
Mounting root from ufs:/dev/da0s1a
da0 at ahc0 bus 0 target 0 lun 0
da0: <QUANTUM ATLAS IV 9 WLS 0909> Fixed Direct Access SCSI-3 device
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da0: 8761MB (17942584 512 byte sectors: 255H 63S/T 1116C)
atacontrol cap 0 0:
ATA channel 0, Master, device ad0:
ATA/ATAPI revision 6
device model Maxtor 53073U6
serial number K60CHWNC
firmware revision DAC10SC0
cylinders 4092
heads 16
sectors/track 63
lba supported 60030432 sectors
lba48 not supported
dma supported
overlap not supported
Feature Support Enable Value Vendor
write cache yes yes
read ahead yes yes
dma queued no no 0/00
SMART yes yes
microcode download yes yes
security yes yes
power management yes yes
advanced power management yes no 0/00
automatic acoustic management yes no 254/FE 192/C0
>Description:
ATA disk reports 4092 cylinders so lba sector count isn't used.
This results in a 2GB disk being detected instead of the full 30GB
from ata-disk.c:
/* use the 28bit LBA size if valid */
if (atadev->param->cylinders == 16383 &&
adp->total_secs < atadev->param->lba_size)
adp->total_secs = atadev->param->lba_size;
So only if the reported numbers of cylinders os 16383 the lba size is taken into account,
should we check for lba-support (bit 9, word 49 of 'identify device' information)?
>How-To-Repeat:
>Fix:
My guess at a fix would be to replace line 135 of ata-disk.c (1.60.2.23)
if (atadev->param->cylinders == 16383 &&
with
if (atadev->param->support_lba &&
but I haven't been able to test this.
>Release-Note:
>Audit-Trail:
>Unformatted:
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