Turns out we had a bad disk which was causing all sorts of problems on the channel and also a bad port on the fiber channel card.

Does anyone know how to fail one channel on a dual channel FC card ?

Thanks for those who replied with suggestions to check firmware etc.. On Wed, 15 Jun 2005 devnull@adc.idt.com wrote:

Date: Wed, 15 Jun 2005 17:03:11 -0400 (EDT) From: devnull@adc.idt.com To: NetApp Toasters List toasters@mathworks.com Subject: F825 scsi transport errors

I am seeing a bunch of these errors in my messages file

Wed Jun 15 15:42:35 EST [scsi.cmd.transportError:error]: Device 8a.29: Transport error during execution of command: HA status 0x9: cdb 0x28:07819108:0008. Wed Jun 15 15:42:35 EST [scsi.cmd.retrySuccess:info]: Device 8a.29: request successful after retry #1: cdb 0x28:07819108:0008.

The device 8a.29 is a 72G FC hard drive in a DS-14 Shelf(not MK2), it is not the only device that is seeing this error, a few other hard drives are also reporting this error. All the drives reporting the error are in the same shelf. I have 2 shelves on this filer and they are connected to one dual channel FC card in a redundant loop fashion.

If you look at 8a.17, it has about 1200 Loss of sync count on it. I am not sure why the filer has not started using "8b.17" instead(and that I will know that this might be a cable problem or port on card problem) If the problems continue with 8b.17, that would be indicative of a problem with the hard drive electrical contacts or the shelf.

Any thoughts ?

Filer> fcstat link_stats

Loop Link Underrun Loss of Invalid Frame In Frame Out ID Failure count sync CRC count count count count count 8a.29 5 6 11 0 50707676 90150230 8a.28 0 13 0 0 403142256 861951762 8a.27 0 0 2 0 2990027 2668141 8a.26 0 0 2 0 9082 9078 8a.25 0 56 0 0 355574676 1322428194 8a.24 0 99 3 0 359416275 1322571091 8a.23 0 100 0 0 360773680 1329183182 8a.22 0 0 0 0 7625 7625 8a.21 0 103 9 0 357740467 1326091355 8a.20 0 97 0 0 312139583 1120155801 8a.19 0 9 1 0 5198806 6652372 8a.18 0 1 2 0 9078863 7176071 8a.17 0 0 1196 0 21113226 120996952 8a.16 0 0 27 3 134144213 618879531 8a.45 0 0 9 0 3278706 3280636 8a.44 0 0 10 0 1496012 859502 8a.43 0 0 0 0 529038 502216 8a.42 0 0 1 0 172523534 850902550 8a.41 0 0 0 0 792454 444308 8a.40 0 0 9 5 27529984 132506842 8a.39 0 0 3 0 145441751 719150297 8a.38 0 0 3 1 171861672 850048068 8a.37 0 0 5 1 171799244 849465448 8a.36 0 0 3 1 172307043 849408939 8a.35 0 0 5 1 171828425 849442631 8a.34 0 0 5 14 171060731 849927835 8a.33 0 0 10 0 9064 9068 8a.32 0 0 7 0 29133347 135203123 8a.ha 4 484 1 25 14222732146 3614609352

Loop Link Underrun Loss of Invalid Frame In Frame Out ID Failure count sync CRC count count count count count

8b.16 2 0 7 0 27269445 122723901 8b.17 0 0 1 0 129436413 620075451 8b.18 0 0 0 0 355738315 1322772943 8b.19 0 0 2 0 367098577 1330378723 8b.20 0 0 1 0 52197238 208888734 8b.21 0 0 2 0 6903081 3234401 8b.22 0 0 0 0 17996706 18006888 8b.23 0 0 4 0 3922623 575217 8b.24 0 0 4 0 5160927 6612953 8b.25 0 0 0 0 9076262 7176226 8b.26 0 0 0 0 364796982 1329307992 8b.27 0 0 1 0 361740576 1326995766 8b.28 0 0 3 0 9155 9089 8b.29 0 0 5 0 308849035 1120301901 8b.32 0 0 11 0 146661640 720366350 8b.33 0 0 0 0 181037871 861216087 8b.34 0 0 0 0 2293590 3440934 8b.35 0 0 2 0 1503138 2998230 8b.36 0 0 1 0 984366 2509556 8b.37 0 0 4 0 1503671 2996067 8b.38 0 0 1 0 1503562 3002116 8b.39 0 0 2 0 27978729 134437937 8b.40 0 0 5 0 145948085 721301831 8b.41 0 0 0 0 172626088 853051146 8b.42 0 0 0 0 984286 2508390 8b.43 0 0 0 0 173013430 853277534 8b.44 0 0 0 0 207459905 786015867 8b.45 0 0 6 0 18050232 18060380 8b.ha 0 0 1 0 12502097306 3132163798

/dev/null

devnull@adc.idt.com

/dev/null

devnull@adc.idt.com