Re: iSCSI target

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

On Fri, 21 Feb 2020 at 12:41, BERTRAND Joël <joel.bertrand%systella.fr@localhost> wrote:
>
> With
>
> # extent    file or device      start       length
> extent0     /dev/rwd0           0           32GB
>
> # target    flags   storage     netmask
> target0     rw      extent0     192.168.10.103/32
>
> iscsid seems to run as expected. But if I want to export a second
> target, how can I modify targets file ? I suppose I have to add
>
> extent1     /dev/rwd0            32GB+1sector 32GB

You export raw partition device; if you want to have many targets from
one physical disk, you split the disk in any way you can - fdisk,
gpt/dkctl or ZFS zvols and export the raw varieties of those.

Im my case I have a 250GB disk which used to be GPT and split in some
10-12 partitions, some of which - 3 or 4 - were iSCSI exported; the
rest were used by NVMM virtual machines. Lately I destroyed these and
created a zpool in their place, now I am using zvols for the same
purpose, e.g. my targets file is:
...
extent0        /dev/zvol/rdsk/pail/iscsia      0               30GB
extent1         /dev/zvol/rdsk/pail/nbsd        0                4GB
# target        flags   storage         netmask
target0         rw      extent0         0.0.0.0/0
target1         rw      extent1         0.0.0.0/0

The rest of the volumes are for VMs:
...
 zfs list -t volume

           [12:57:24]
NAME               USED  AVAIL  REFER  MOUNTPOINT
pail/f12          4.13G  13.6G  1.24G  -
pail/iscsia       30.9G  16.3G  25.4G  -
pail/lxmint       24.8G  20.5G  15.0G  -
pail/mxlinux      24.8G  16.3G  19.2G  -
pail/nbsd         4.13G  14.2G   714M  -
pail/omnios       24.8G  34.7G   785M  -
pail/openbsd      4.13G  14.1G   832M  -
pail/truecommand  20.6G  26.5G  4.90G  -
pail/w10          44.8G  37.7G  11.8G  -
pail/w19          30.9G  28.0G  13.7G  -

...


> target1....
>
> How can I configure extent1 to begin just after extent0 ?
>
>         Regards,
>
>         JKB


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