so after commit 8141d67b. the tgtd is not Backward compatible? and we have to use tgtd before commit 8141d67b for compatible with multipath/udev of rhel6.2 or rebuild a different multipath/udev in rhel6.2? 2014-06-15 14:23 GMT+08:00 Or Gerlitz <ogerlitz@xxxxxxxxxxxx>: > On 03/06/2014 09:09, Apollon Oikonomopoulos wrote: >> >> On 14:43 Mon 02 Jun , Nicholas A. Bellinger wrote: >>> >>> Forwarding to the correct stgt-devel list.. >>> >>> On Fri, 2014-05-30 at 17:38 +0800, lingli tang wrote: >>>> >>>> [...] >>>> 1. [...] cpu（%user,%sys,%iowait,%idle）,memory(Total，used, free, >>>> >>>> buffer, cache), IOPS(read request, write request), Througthput(read >>>> kb, write kb)， >>>> >>>> we use tgtd 1.0.47 to export a disk and use iscsiadm to load it. >>>> but the ID_SERIAL of this disk is not the same with scsi_id of export >>>> disk. >>>> if we use tgtd 1.0.24 it is the same. >>>> after iscsiadm log in, we check the ID_SERIAL of this disk using >>>> “udevadm info --query=all --path=/block/sdb”： >>>> E: ID_SERIAL_RAW=360000000000000000e001000c00000e0 >>>> E: ID_SERIAL=360000000000000000e001000c00000e0 >>>> E: ID_SERIAL_SHORT=60000000000000000e001000c00000e0 >>>> >>>> but with tgtd 1.0.24, it is correct: >>>> E: ID_SERIAL_RAW=1test1-iscsi-iser >>>> E: ID_SERIAL=1test1-iscsi-iser >>>> E: ID_SERIAL_SHORT=test1-iscsi-iser >>>> >>>> test environment rhel6.2 >> >> We were debugging the exact same thing yesterday, after our persistent >> links under /dev stopped working, so here's the short version of the >> story: >> >> Commit 6402eb8 added an NAA local designator (WWN) field to tgt's 0x83 >> VPD (the Device Identification page), and commit 8141d67b further added >> an extended WWN. All three identifiers are sent out in tgt's 0x83 VPD, >> but udev's scsi_id helper always picks the binary WWN by preference and >> uses it as ID_SERIAL, i.e. ignores the ASCII T10 (ID_SERIAL) identifier >> present in the VPD. If you use sg_inq from the sg3-utils package you >> will get both. >> >> I'm not sure tgt can do much more than make both NAA identifiers >> optional, the issue seems to lie with udev at this point. >> >> > > I added Dennis who is the author of commit 8141d67b -- he made the following > comment: "[...] This is most likely an issue with udev. Most of the udev > tools look at Inquiry VPD 0x83 before looking at VPD 0x80. With the NAA > pages now defined in VPD 0x83, the tools are using that information instead > of VPD 0x80." -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
