Hi experts, I have some questions about LinkDown of SG-XPCI2FC-QF2-Z.
I got the following advice from Mr. Richard. Please send me any comments or advices. Best regards, Satoshi Yajima -------- Original Message -------- Subject: Re: Second Try: about LinkDown of SG-XPCI2FC-QF2-Z. Date: Wed, 30 Jul 2008 22:44:39 -0700 From: Richard Elling <[EMAIL PROTECTED]> [EMAIL PROTECTED] wrote: > Sorry to send this mail again. I'm not sure there are many fibre channel experts on this alias. You might also ask on the external [email protected] mail alias. My impressions below... > > I have a customer who is waiting for an immediate answer of the > following question. > > But, I have not received the information necessary for the answer. > > Please send me any comments or informations. > > Thanks and Regards, > Satoshi Yajima > > > -------- Original Message -------- > Subject: about LinkDown of SG-XPCI2FC-QF2-Z. > Date: Fri, 25 Jul 2008 13:06:09 +0900 > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED] > CC: Mukaeda Toshiki <[EMAIL PROTECTED]>, Satoshi Yajima > <[EMAIL PROTECTED]> > > Hi experts, > > These are four questions concerning the message at the following > configuration. > > Server : Sun Fire V440 > OS : Solaris 8 2/04 > HBA : SG-XPCI2FC-QF2-Z > > 1.When link-down occurs in the above HBA, does the message output > to Syslog ? > What is the log level ? > (for example kern.info etc.) Probably not. The reason is that a switched fabric and arbitrated loop handle these conditions differently. Most HBAs are designed to work for both. In an arbitrated loop configuration, a loop reconfiguration may occur relatively frequently, but while it is detected by all nodes on the loop, it is not considered a failure condition. > > 2. If a switch or a storage connects to above configuration,and > when link-down occurs in the switch or the storage,does the HBA > go link-down and notify ? > > 3. Even when the error occurs only in one of RX or TX, does the > message output ? > Or only when the error occurs in both,does the message output as > link-down ? AFAIK, TX errors are not detected in fibre channel. The HBA is constantly transmitting and link detection can only occur on the receiving side. > > 4.When link-down occurs between storage to the above environment,and > if it is failed to write the storage,does the message output to syslog ? > What is the log level ? > (for example kern.info etc.) Device timeouts which occur at the sd or ssd driver occur after 60 second retry intervals with 3-5 retries. For most fibre channel interfaces, there will be 3 retries. For each retry, a syslog message is recorded with the indication that a retry is in progress. After the timeout and retry intervals are exceeded, then the errors will propagate up the software stack. For Solaris NV b72 or later, the FMA I/O retire diagnosis engine will report diagnosis and can be configured to provide SNMP traps. However, usually the failure will be noted by the higher- level software like file systems. -- richard _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
