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Date:      Fri, 14 Mar 2014 22:26:15 -0400
From:      Mark Saad <nonesuch@longcount.org>
To:        "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org>
Subject:   Re: sa0 devices disappear after power cycling tape library
Message-ID:  <09A7582E-ED1C-44A2-B235-ED9A8C7711F8@longcount.org>
In-Reply-To: <0EA8C46E-9903-4602-8F82-2BB9BA1180A6@langille.org>
References:  <0EA8C46E-9903-4602-8F82-2BB9BA1180A6@langille.org>

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On Mar 14, 2014, at 10:15 PM, Dan Langille <dan@langille.org> wrote:

>>> On Mar 14, 2014, at 8:14 PM, Dan Langille <dan@langille.org> wrote:
>>> =3D20
>>> I have a tape library which acts up from time to time and I power cycle i=
t=3D
>> .
>>> =3D20
>>> After running camcontrol devlist rescan, some of the devices are missing=

>>> =3D20
>>> This what I see in dev after power cycling the FreeBSD 9.2 server:
>>> =3D20
>>> $ ls *sa*
>>> lrwxr-xr-x  1 root  wheel        6 Mar  8 02:12 esa0 -> esa0.0
>>> crw-rw----  1 root  operator  0x70 Mar  8 02:12 esa0.0
>>> crw-rw----  1 root  operator  0x76 Mar  8 02:12 esa0.1
>>> crw-rw----  1 root  operator  0x79 Mar  8 02:12 esa0.2
>>> crw-rw----  1 root  operator  0x7c Mar  8 02:12 esa0.3
>>> crw-rw----  1 root  operator  0x75 Mar  8 02:12 nsa0.1
>>> crw-rw----  1 root  operator  0x78 Mar  8 02:12 nsa0.2
>>> crw-rw----  1 root  operator  0x7b Mar  8 02:12 nsa0.3
>>> crw-rw----  1 root  operator  0x74 Mar  8 02:12 sa0.1
>>> crw-rw----  1 root  operator  0x77 Mar  8 02:12 sa0.2
>>> crw-rw----  1 root  operator  0x7a Mar  8 02:12 sa0.3
>>> =3D20
>>> This is what I see after rebooting the FreeBSD server:
>>> =3D20
>>> $ ls -l *sa*
>>> lrwxr-xr-x  1 root  wheel        6 Mar 15 00:09 esa0 -> esa0.0
>>> crw-rw----  1 root  operator  0x70 Mar 15 00:09 esa0.0
>>> crw-rw----  1 root  operator  0x76 Mar 15 00:09 esa0.1
>>> crw-rw----  1 root  operator  0x79 Mar 15 00:09 esa0.2
>>> crw-rw----  1 root  operator  0x7c Mar 15 00:09 esa0.3
>>> lrwxr-xr-x  1 root  wheel        6 Mar 15 00:09 nsa0 -> nsa0.0
>>> crw-rw----  1 root  operator  0x6f Mar 15 00:09 nsa0.0
>>> crw-rw----  1 root  operator  0x75 Mar 15 00:09 nsa0.1
>>> crw-rw----  1 root  operator  0x78 Mar 15 00:09 nsa0.2
>>> crw-rw----  1 root  operator  0x7b Mar 15 00:09 nsa0.3
>>> lrwxr-xr-x  1 root  wheel        5 Mar 15 00:09 sa0 -> sa0.0
>>> crw-rw----  1 root  operator  0x6e Mar 15 00:09 sa0.0
>>> crw-rw----  1 root  operator  0x74 Mar 15 00:09 sa0.1
>>> crw-rw----  1 root  operator  0x77 Mar 15 00:09 sa0.2
>>> crw-rw----  1 root  operator  0x7a Mar 15 00:09 sa0.3
>>> crw-rw----  1 root  operator  0x6d Mar 15 00:09 sa0.ctl
>>> =3D20
>>> Should I just do some ln -s?  Something easier, I=3DE2=3D80=3D99m sure=3D=
E2=3D80=3DA6.=3D
>>=20
>>> =3D20
>>=20
>>=20
>> Have you tried a camcontrol rescan ?
>=20
> Yes, that=E2=80=99s what I meant by 'camcontrol devlist rescan=E2=80=99 ab=
ove=E2=80=A6
>=20

Sorry I missed that , I think that syntax may not do what you want=20

> I ran: camcontrol rescan all.  The output above is after that command.
>=20


How is the dlt drive attached , fc-al , sas or SCSI ?=20


>> Also what does camcontrol devlist -v   s=3D
>> how before and after the reboot ?=3D20
>=20
> I don=E2=80=99t have before, but after is:
>=20
> $ sudo camcontrol devlistol devlist
> Password:
> <ATA TOSHIBA DT01ACA3 ABB0>        at scbus0 target 2 lun 0 (pass0,da0)
> <ATA TOSHIBA DT01ACA3 ABB0>        at scbus0 target 10 lun 0 (pass1,da1)
> <ATA TOSHIBA DT01ACA3 ABB0>        at scbus0 target 11 lun 0 (pass2,da2)
> <ATA TOSHIBA DT01ACA3 ABB0>        at scbus0 target 12 lun 0 (pass3,da3)
> <ATA TOSHIBA DT01ACA3 ABB0>        at scbus0 target 13 lun 0 (pass4,da4)
> <ATA TOSHIBA DT01ACA3 ABB0>        at scbus0 target 14 lun 0 (pass5,da5)
> <ATA TOSHIBA DT01ACA3 ABB0>        at scbus0 target 16 lun 0 (pass6,da6)
> <ATA TOSHIBA DT01ACA3 ABB0>        at scbus0 target 17 lun 0 (pass7,da7)
> <TOSHIBA DT01ACA300 MX6OABB0>      at scbus5 target 0 lun 0 (ada0,pass8)
> <TOSHIBA DT01ACA300 MX6OABB0>      at scbus5 target 1 lun 0 (ada1,pass9)
> <QUANTUM DLT8000 0250>             at scbus7 target 4 lun 0 (sa0,pass10)
> <OVERLAND LXB 0524>                at scbus7 target 6 lun 0 (pass11,ch0)
>=20
> IIRC, before I ran the command, the last two entries were missing.
>=20

So this is a robotic library and drive ?=20


Also do I I read you right the sa0 entry is back,or you still just have have=
 sa0.0 ?

  You could use etc/devfs.conf to make a link entry , see the end of the fil=
e for examples. But I suspect something else is up . I have seen this before=
 but I can't remember what caused it off hand .=20


> --=20
> Dan Langille - http://langille.org
>=20


Mark saad | mark.saad@longcount.org=20=



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