Date: Thu, 4 Jun 2015 17:33:07 +0200 From: Borja Marcos <borjam@sarenet.es> To: Alan Somers <asomers@freebsd.org> Cc: FreeBSD-scsi <freebsd-scsi@freebsd.org> Subject: Re: LSI 3008 based HBA (mpr) and backplane slot identification Message-ID: <539C61B5-770C-4C75-8B1E-258BB885B55E@sarenet.es> In-Reply-To: <CAOtMX2jLkXtV7smc9Ot0iu0ZJbx9nxwJ2r6ZNxwPxtetC83MQA@mail.gmail.com> References: <42B5FB65-9A1A-4F55-A15A-1F91F9770363@sarenet.es> <CAOtMX2jLkXtV7smc9Ot0iu0ZJbx9nxwJ2r6ZNxwPxtetC83MQA@mail.gmail.com>
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On Jun 4, 2015, at 5:23 PM, Alan Somers wrote: > I've never used sas3ircu or sas2ircu, but it's probably getting the > slot number based on either the expander's SES Additional Element > Status Page, or by the expander's SMP DISCOVER response. Both of > those methods will give stable responses. Even if you swap drives, > move them around, turn phys on and off, etc, both of those methods > will still map the same physical slot to the same Slot # every time. > Only an expander or HBA firmware upgrade can change it. However, the > slot mapping may not make intuitive sense. You'll have to experiment > to see what Slot # corresponds to what physical slot. Thank you very much. At least on the machines on which I am using it, = the mapping is stable and even intuitive.=20 What I was wondering was it something could change the mapping = unexpectedly.=20 Understood, a firmware update is a risk, but I was thinking about those = static mappings between target IDs and particular disks (I imagine, serial numbers) kept = by the HBA. It would be a tickling timebomb if, say, after four or five disk = replacements numbers begun to get shuffled. > When you need to replace a drive, your best option would be to use the > "sas3ircu locate" command to turn on the slot's error LED. Then you > won't need to consult a slot mapping diagram. Sorry, I didn't know that command. I haven't been exactly eager to try = options to sas[23]ircu because it's intended for IR firmware (or that I understand) and I am = using IT. Thank you very much! Borja.
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