[stgt] [linux-iscsi-users] 2TB+ LUNs?

[FUJITA Tomonori]

On Tue, 27 Jan 2009 16:56:51 -0800
Ray Van Dolson <rvandolson at esri.com> wrote:

> On Tue, Jan 27, 2009 at 04:35:24PM -0800, Richard Sharpe wrote:
> > On Tue, Jan 27, 2009 at 4:04 PM, Ray Van Dolson <rvandolson at esri.com> wrote:
> > > On Tue, Jan 27, 2009 at 02:37:48PM -0800, Richard Sharpe wrote:
> > >
> > > Thanks for the reply Richard.
> > >
> > > I don't see anything at all really in the target's syslogs, nor in
> > > dmesg.  I ran tgtd in debug mode in the foreground, but it was very
> > > noisy (obviously) and I wasn't really sure what I was looking for.
> > >
> > > I've also taken a packet dump of a connection.  Maybe someone can find
> > > something useful from it?
> > 
> > Ahhh, fire it up in WireShark and check to see if the
> > ReadCapacity(16)s were making it onto the wire. They are actually
> > ServiceActionIns or something with an action of ReadCapacity.
> > 
> > If they were making it onto the wire, then that might point the finger
> > at the target ...
> > 
> > If not, it would suggest that the initiator is at fault.
> > 
> 
> Did a search in the packet bodies (tcpdump'd with -s 0 btw) for both
> the string "ReadCapacity" as well as "ServiceActionIns" and didn't come
> up with anything.
> 
> If anyone wants to take a look for themselves, feel free to take a
> gander at the dump URL I posted previously.

Hmm, looks like the initiator sent SAI_READ_CAPACITY_16 (77th packet).

I thought even very old STGT can handle this (you use 20070620)
because the code is based on IET but I might be wrong. Try the latest
STGT,

http://stgt.berlios.de/releases/tgt-0.9.3.tar.bz2


With it and open-iscsi, I got:

scsi0 : iSCSI Initiator over TCP/IP
scsi 0:0:0:0: RAID              IET      Controller       0001 PQ: 0 ANSI: 5
scsi 0:0:0:1: Direct-Access     IET      VIRTUAL-DISK     0001 PQ: 0 ANSI: 5
Driver 'sd' needs updating - please use bus_type methods
sd 0:0:0:1: [sda] Very big device. Trying to use READ CAPACITY(16).
sd 0:0:0:1: [sda] 34359738368 512-byte hardware sectors (17592186 MB)
sd 0:0:0:1: [sda] Write Protect is off
sd 0:0:0:1: [sda] Mode Sense: 79 00 00 08
sd 0:0:0:1: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 0:0:0:1: [sda] Very big device. Trying to use READ CAPACITY(16).
sd 0:0:0:1: [sda] 34359738368 512-byte hardware sectors (17592186 MB)
sd 0:0:0:1: [sda] Write Protect is off
sd 0:0:0:1: [sda] Mode Sense: 79 00 00 08
sd 0:0:0:1: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 sda: unknown partition table
sd 0:0:0:1: [sda] Attached SCSI disk
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