Well, did it. I finally got Ubuntu 10.04 LTS installed and running on my Net4801 (via PXE netboot install and serial console), and got Lio-Target running on it:
root@net4801:~# cat /proc/cpuinfo
processor : 0
vendor_id : Geode by NSC
cpu family : 5
model : 9
model name : Unknown
stepping : 1
cpu MHz : 266.670
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu tsc msr cx8 cmov mmx cxmmx up
bogomips : 533.34
clflush size : 32
cache_alignment : 32
address sizes : 32 bits physical, 32 bits virtual
power management:
root@net4801:~# /etc/init.d/target status
[—————————] TCM/ConfigFS Status [—————————-]
\——> iblock_0
HBA Index: 1 plugin: iblock version: v3.5.3
\——-> lun0
Status: ACTIVATED Execute/Left/Max Queue Depth: 0/32/32 SectorSize: 512 MaxSectors: 240
iBlock device: sdc
Major: 8 Minor: 32 CLAIMED: IBLOCK
udev_path: /dev/sdc
[—————————] LIO-Target Status [—————————-]
\——> iqn.2010.com.digitallyaccurate.net4801:lun0
\——-> tpgt_1 TargetAlias: LIO Target
TPG Status: ENABLED
TPG Network Portals:
\——-> xxx.xxx.xxx.xxx:3260
TPG Logical Units:
\——-> lun_0/iscsi00 -> target/core/iblock_0/lun0
Target Engine Core ConfigFS Infrastructure v3.5.3 on Linux/i586 on 2.6.32-38-386
Linux-iSCSI.org Target v3.5.3 on Linux/i586 on 2.6.32-38-386
root@net4801:~#
(IP removed from TPG)
Ubuntu is running off the Compact Flash card. There is a hard drive inside the Net4801 which was used as a block device for the iSCSI target, note the net4801 IDE channel only runs UDMA/33. After testing this, I popped in a USB 2.0 PCI card, and attached a 500GB USB drive. Please see a pic below:
Tests:
Writing around 1.6MB/sec (CPU utilization ~40%)
Reading around 2.5MB/sec (CPU utilization ~80%)
Please Note:
The test numbers are not exactly correct due to caching Windows performs.
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"Please Note:
The test numbers are not exactly correct due to caching Windows performs."
That disclaimer made my day, I just had to burst out laughing.
(And yes, it's true, Windows makes use of so-called "aggressive caching" on iSCSI)