[OpenIndiana-discuss] 3x LSI 9211-8i controllers + direct attach backplane -- appear as on controller

[Rich]

I bet you $50 you can use sas2ircu on the IT firmware, particularly
with the locate command.

[Don't take the bet; if you do, I'll link you to a private github repo
with some code that does it, and my PayPal account.]

- Rich

On Fri, Nov 18, 2011 at 6:29 PM, Jason J. W. Williams
<jasonjwwilliams at gmail.com> wrote:
> It would be nice if disk manufacturers offered firmware flavors with quick fail timeouts/reduced retries on failed read/write ops. Along the lines of the firmware loads they give array OEMs.
>
> -J
>
> Sent via iPhone
>
> Is your email Premiere?
>
> On Nov 18, 2011, at 15:48, Mark <mark0x01 at gmail.com> wrote:
>
>> On 18/11/2011 12:51 a.m., Rich wrote:
>>> On Wed, Nov 16, 2011 at 11:52 PM, Eric D. Mudama
>>> <edmudama at bounceswoosh.org>  wrote:
>>>> On Wed, Nov 16 at 13:47, Bill Sommerfeld wrote:
>>>>>
>>>>> On 11/16/11 13:27, James C. McPherson wrote:
>>>>>>
>>>>>> (and apart from "I don't understand
>>>>>> it therefore it must be bad" I don't know why you really would)
>>>>>
>>>>> I don't like mpxio disk names -- they make me work too hard and create
>>>>> fear of
>>>>> doing the wrong thing.
>>>>>
>>>>> Long hex strings are much harder to distinguish than short strings and
>>>>> it's
>>>>> much easier to get confused between two devices.  humans are reasonably
>>>>> good
>>>>> at dealing with dense sets of small integers, and not quite so good at
>>>>> dealing
>>>>> with sparse sets of 64-bit and 128-bit values.
>>>>>
>>>>> are c2t5000C5002C68468Bd0 and c2t5000C5002C68468Bd0 the same or different?
>>>>> what about c2t5000C5002C68203Bd0 and c2t5000C5002C689ABFd0?
>>>>>
>>>>> are c2t5d0s0 and c2t6d0s0 the same or different?  how about sd5a and sd5a?
>>>>>
>>>>> how much time did each of those comparisons take you?  how quickly were
>>>>> you
>>>>> sure of your answer?
>>>>
>>>> The important part to me is that the 000C5002C68468B above is
>>>> typically printed on the label of the drive.  Put a little sticker on
>>>> your sled with the contained WWN, and you won't make the mistake of
>>>> grabbing the wrong drive from the array again. (They need a support
>>>> group for that)
>>>
>>> SES means you can blink the drive LED and, with a convenient mapping
>>> method, not have this issue again. :)
>>>
>>> - Rich
>> A simple "locate" application is still elusive, inspite of SES.
>>
>> And LSI 6G SAS controllers lack SES support in the IT firmware, so I run mine in IR mode (with no raid defined).
>>
>> A single bad disk (SATA, SAS or FC) still stops the server dead while it retries. ZFS really could do with kernel and driver tuning.
>> With a raid system, ignore a read error and just correct and deliver the data, and then write it back which in most cases triggers a disk bad sector replacement and the problem is sorted quickly.
>>
>> Mark.
>>
>>
>>
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