[stgt] tgtd 1.0.7 and large targets

[ronnie sahlberg]

Hi,

I just created a 10TB LUN with latest git for tgtd.
And the initiator can successfully see that the disk is 10TB.
Using ServiceActionIn/ReportCapacity16 correctly.


My system is a 64 bit system,  is your box 32 or 64 bit?


regards
ronnie sahlberg



On Sun, Oct 31, 2010 at 7:49 AM, Robert Lawrence <robert at bluehost.com> wrote:
> I recently attempted an upgrade from tgtd 1.0.5 to tgtd 1.0.10 on a server
> with several multi-terrabyte arrays, but after the upgrade all the linux
> initiators started giving complaints about unsupported sector sizes.
>
> I setup a test server and initiator client to try to figure out the problem,
> and found that some change between 1.0.6 and 1.0.7 caused the breakage.  My
> test setup had an initiator which is a fresh stock centos 5.5 install.  The
> target server, had two arrays, one small to verify connectivity, that worked
> in both 1.0.6 and 1.0.7, but the other, which was 6T in size did work in
> 1.0.6 but not in 1.0.7.  I dropped the size a couple times on the large
> array until I got a sub 2T size, and that worked.  One odd thing that I
> noticed was that with several different sizes above 2T the client repeatedly
> reported the sector size of 1229280288.
>
> Doing a diff on the documentation between 1.0.6 and 1.0.7 I didn't find
> anything documented that would cause this.  Any help in tracking down the
> bug or what I need to do differently would be appreciated.
>
> Thanks,
> Robert
>
>
> results of my testing:
> tgtd 1.0.6
> target:
> Size: 5992339 MB
> initiator:
> Oct 30 13:33:24 vanilla kernel: sdb : very big device. try to use READ
> CAPACITY(16).
> Oct 30 13:33:24 vanilla kernel: SCSI device sdb: 11703787520 512-byte hdwr
> sectors (5992339 MB)
>
>
> tgtd 1.0.7
> target:
> Size: 5992339 MB
> initiator:
> Oct 30 14:06:43 vanilla kernel: sdb : very big device. try to use READ
> CAPACITY(16).
> Oct 30 14:06:43 vanilla kernel: sdb : unsupported sector size 1229280288.
> Oct 30 14:06:43 vanilla kernel: SCSI device sdb: 0 512-byte hdwr sectors (0
> MB)
>
> target:
> Size: 2693804 MB
> initiator:
> Oct 30 14:16:25 vanilla kernel: sdb : very big device. try to use READ
> CAPACITY(16).
> Oct 30 14:16:25 vanilla kernel: sdb : unsupported sector size 1229280288.
> Oct 30 14:16:25 vanilla kernel: SCSI device sdb: 0 512-byte hdwr sectors (0
> MB)
>
> target:
> Size: 2199023 MB
> initiator:
> Oct 30 14:17:31 vanilla kernel: sdb : very big device. try to use READ
> CAPACITY(16).
> Oct 30 14:17:31 vanilla kernel: sdb : unsupported sector size 1229280288.
> Oct 30 14:17:31 vanilla kernel: SCSI device sdb: 0 512-byte hdwr sectors (0
> MB)
>
> target:
> Size: 1649267 MB
> initiator:
> Oct 30 14:18:15 vanilla kernel: SCSI device sdb: 3221225472 512-byte hdwr
> sectors (1649267 MB)
>
>
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