i386/74074: hw.ata.wc=0 / but write cache still enabled

[Arne Wörner]

The following reply was made to PR i386/74074; it has been noted by GNATS.

From: Arne "Wörner" <arne_woerner at yahoo.com>
To: freebsd-gnats-submit at freebsd.org
Cc: "Björn" "König" <bkoenig at cs.tu-berlin.de>
Subject: RE: i386/74074: hw.ata.wc=0 / but write cache still enabled
Date: Mon, 29 Nov 2004 02:39:16 -0800 (PST)

 > Please tell more information about your hardware, i.e. controller and hard
 > disk.
 >
 ok. Let me know, if you need more information.
 
 from /var/log/messages (boot message):
 Nov 29 07:15:02 neo kernel: atapci0: <VIA 8235 UDMA133 controller> port
 0xfc00-0xfc0f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 17.1 on pci0
 Nov 29 07:15:02 neo kernel: ata0: channel #0 on atapci0
 Nov 29 07:15:02 neo kernel: ata1: channel #1 on atapci0
 Nov 29 07:15:02 neo kernel: ad0: 38166MB <ST340015A/3.01> [77545/16/63] at
 ata0-master UDMA100
 Nov 29 07:15:02 neo kernel: ad1: 152627MB <SAMSUNG SP1604N/TM100-24>
 [310101/16/63] at ata0-slave UDMA100
 Nov 29 07:15:02 neo kernel: acd0: DVDR <TOSHIBA DVD-ROM SD-R5112/1033> at
 ata1-master UDMA33
 Nov 29 07:15:02 neo kernel: acd1: CDROM <LTN526/YH0X> at ata1-slave UDMA33
 Nov 29 07:15:02 neo kernel: cd0 at ata1 bus 0 target 0 lun 0
 Nov 29 07:15:02 neo kernel: cd1 at ata1 bus 0 target 1 lun 0
 
 
 from atacontrol:
 neo# atacontrol cap 0 0
 ATA channel 0, Master, device ad0:
 
 Protocol              ATA/ATAPI revision 6
 device model          ST340015A
 serial number         5LA0T604
 firmware revision     3.01
 cylinders             16383
 heads                 16
 sectors/track         63
 lba supported         78165360 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      0/0x00
 SMART                          yes      yes
 microcode download             yes      yes
 security                       yes      no
 power management               yes      yes
 advanced power management      no       no      0/0x00
 automatic acoustic management  no       no      128/0x80        128/0x80
 
 
 neo# atacontrol cap 0 1
 ATA channel 0, Slave, device ad1:
 
 Protocol              ATA/ATAPI revision 7
 device model          SAMSUNG SP1604N
 serial number         S013J10X766520
 firmware revision     TM100-24
 cylinders             16383
 heads                 16
 sectors/track         63
 lba supported         268435455 sectors
 lba48 supported       312581808 sectors
 dma supported
 overlap not supported
 
 Feature                      Support  Enable    Value   Vendor
 write cache                    yes      yes
 read ahead                     yes      yes
 dma queued                     no       no      0/0x00
 SMART                          yes      yes
 microcode download             yes      yes
 security                       yes      no
 power management               yes      yes
 advanced power management      no       no      0/0x00
 automatic acoustic management  yes      yes     254/0xFE        254/0xFE
 
 neo# sysctl hw.ata.wc
 hw.ata.wc: 0
 
 
 
 		
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