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

[Mike Christie]

Ray Van Dolson wrote:
> Hello all, I'm running the iscsi-initiator-utils package v4.0.3.0
> (included with RHEL4) and trying to link up to a 2TB LUN exported from
> a RHEL5.2 machine using STGT (0.20070620snap).
> 
> The RHEL4 machine is running 32-bit while the RHEL5 machine is 64-bit.
> 
> When I log in to the target, I see the following in dmesg:
> 
>   iscsi-sfnet:host2: Session established
>   scsi2 : SFNet iSCSI driver
>   scsi: unknown device type 12
>     Vendor: IET       Model: Controler         Rev: 0001
>     Type:   RAID                               ANSI SCSI revision: 05
>   Attached scsi generic sg2 at scsi2, channel 0, id 0, lun 0,  type 12
>     Vendor: IET       Model: VIRTUAL-DISK      Rev: 0001
>     Type:   Direct-Access                      ANSI SCSI revision: 05
>   sdb : very big device. try to use READ CAPACITY(16).
>   sdb : READ CAPACITY(16) failed.
>   sdb : status=1, message=00, host=0, driver=08 
>   sdb : use 0xffffffff as device size
>   SCSI device sdb: 4294967296 512-byte hdwr sectors (2199023 MB)
>   SCSI device sdb: drive cache: write back
>   sdb : very big device. try to use READ CAPACITY(16).
>   sdb : READ CAPACITY(16) failed.
>   sdb : status=1, message=00, host=0, driver=08 
>   sdb : use 0xffffffff as device size
>   SCSI device sdb: 4294967296 512-byte hdwr sectors (2199023 MB)
>   SCSI device sdb: drive cache: write back
>    sdb: unknown partition table
>   Attached scsi disk sdb at scsi2, channel 0, id 0, lun 1
>   Attached scsi generic sg3 at scsi2, channel 0, id 0, lun 1,  type 0
> 
> My question is -- are 2TB and larger LUNs supported with this
> initiator?  If so, how?

The initaitor is just passing around data. Those messages come from the 
scsi layer's sd_mod.

With RHEL4's iscsi/scsi code I have setup luns bigger than 2 TB. We have 
a 4 TB one here.

There is a bug in RHEL4, where if you have exactly a 2 TB lun then it 
will not get detected right (this is with iscsi, fc, spi).

ccding the stgt list to make sure that it supports large luns.

What vesion of RHEL is this? Is it 4.0 or 4.4?
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