Date: Sun, 24 Mar 2013 14:19:53 -0500 From: Chris BeHanna <chris@behanna.org> To: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: ZFS: Failed pool causes system to hang Message-ID: <3207E818-28B6-4F48-A100-4527F6D23936@behanna.org> In-Reply-To: <514F4BD6.1060807@sneakertech.com> References: <20130321044557.GA15977@icarus.home.lan> <514AA192.2090006@sneakertech.com> <20130321085304.GB16997@icarus.home.lan> <20130324153342.GA3687@icarus.home.lan> <20130324155448.GA4122@icarus.home.lan> <514F4BD6.1060807@sneakertech.com>
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On Mar 24, 2013, at 13:54 , Quartz <quartz@sneakertech.com> wrote:
>>> [...situations in which you *have* to reboot...]
>=20
> [...all well and good, except for cases where someone has to =
physically hit a button on a remote server...]
>=20
>> People who run servers remotely yet lack this capability are
>> intentionally choosing [snip]
>=20
> Before you get up on a high horse and preach at me, consider a couple =
things:
>=20
> 1) Yes I can set that up, but this is a test box on my desk right now.
>=20
> 2) A hard reset is a hard reset is a hard reset. I'm not bitching that =
I have to physically walk over to the machine, I'm bitching that *THAT I =
HAVE TO RESET IT*. Being able to reset it remotely is NOT an acceptable =
solution or workaround, and has no bearing on my problem.
Sure, there are bugs that inhibit the ability to reboot from =
command-line. We shouldn't shrug them off, but we should also =
acknowledge that the software is very complicated, and rooting out such =
bugs takes time. Plus, this is a volunteer project.
That said, there are some chassis that will let you drop to =
lights-out management and force a reboot without having to physically =
press a button, provided you have a way to reach the lights-out =
management console. This often means, at least, a serial line =
concentrator somewhere ("conserver" is simply awesome), or KVM-over-IP.
Worst case, you have IP-addressable PDUs into which you can =
telnet and hard-reset a particular outlet, to power-cycle a machine that =
is truly, irrevocably stuck, without having to have a human walk over =
and stick a paper clip into the reset hole. This should be a last =
resort, though, as abrupt power-cycling shortens hardware life.
--=20
Best,
Chris BeHanna
chris@behanna.org=
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