Date: Mon, 5 Aug 2013 08:12:01 -0700 From: Dieter BSD <dieterbsd@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: disk is AWOL Message-ID: <CAA3ZYrCiWDFXnLDWKEufDnJ5X8RNePdy1k7B0shD7zMpo3u2sA@mail.gmail.com>
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>> 8.2 amd64
>> ad8 is a 3TB Seagate on nforce4-ultra controller
>>
>> At boot:
>> ad8: 2861588MB <ST3000DM001 9YN166 CC4B>> at ata4-master UDMA100 SATA 3Gb/s
>> DEBUG g_part_gpt.c gpt_read_hdr() ad8 succeeded with pp->>sectorsize=512
>>
>> An hour later:
>> # dd if=/dev/ad8 bs=4k count=1 of=/dev/null
>> dd: /dev/ad8: No such file or directory
>>
>> BUT: there was no "ad8: FAILURE - device detached" or similar message
>> on the console, in dmesg, or in /var/log/*. The disk just disappeared
>> without a peep from the kernel. What's going on?
Frank writes:
> Is this repeatable? Does it appear when you reboot and then vanish
> after a period of time?
The disk reappeared after a reboot, and is still there working fine
(both read and write) after over 21 hours.
> At boot, what does "atacontrol list" say,
Before reboot:
ATA channel 4:
Master: no device present
Slave: no device present
After reboot:
ATA channel 4:
Master: ad8 <ST3000DM001-9YN166/CC4B> Serial ATA II
Slave: no device present
(It shouldn't even report a slave for the SATA ports, since SATA doesn't
*have* slaves.)
> and what about before and after you've tried to read from the drive?
No change, even after being up over 21 hours.
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