Re: [9fans] Petabytes on a budget: JBODs + Linux + JFS

[Eris Discordia <eris.discordia@gmail.com>]

> there's a standard for this
> red	fail
> orange	locate
> green	activity
>
> maybe you're enclosure's not standard.

That may be the case as it's really sort of a cheap hack: Chieftec
SNT-2131. A 3-in-2 "solution" for use in 5.25" bays of desktop computer
cases. I hear ICY DOCK has better offers but didn't see those available
around here.

> since it's a single led and follows the drive, i think this is a voltage
> problem. it just has to do with the fact that the voltage / pullup
> standard changed.

Good enough explanation for me. One thing that gave me worries was the
negative reviews of some early 7200.12's (compared to 7200.11) circulating
around on the web. Apparently, earlier firmware versions on the series had
serious problems--serious enough to kill a drive, some reviews claimed.

> http://sources.coraid.com/sources/contrib/quanstro/root/sys/man/3

Upon reading the man page the line that relieved me was this:

> The LED state has no effect on drive function.

And thanks again for the kind counsel.



--On Friday, September 04, 2009 10:10 -0400 erik quanstrom
<quanstro@quanstro.net> wrote:

>> There's one multi-color (3-prong) LED responsible for this. Nominally,
>> green should mean drive running and okay, alternating red should mean
>> transfer, and orange (red + green) a disk failure. In case of 7200.11's
>
> there's a standard for this
> red	fail
> orange	locate
> green	activity
>
> maybe you're enclosure's not standard.
>
>> I tried changing the bay in which the disk sits and the anomaly follows
>> the  disk so I guess the backplane's okay.
>
> since it's a single led and follows the drive, i think this is a voltage
> problem. it just has to do with the fact that the voltage / pullup
> standard changed.
>
>> Um, I don't have that because I don't have any running Plan 9 instances,
>> but I'll try finding it on the web (if it's been through man2html at
>> some  time).
>
> http://sources.coraid.com/sources/contrib/quanstro/root/sys/man/3
>
> - erik
>