iSCSI initiator and Dell PowerVault MD3000i
000.fbsd at quip.cz
Wed Dec 16 14:57:31 UTC 2009
Daniel Braniss wrote:
>> Hi all,
>> I am playing with iscsi_initiator on FreeBSD 7-STABLE and Dell
>> PowerVault MD3000i. This is the first time I am testing iSCSI...
>> Does anyone have FreeBSD's iSCSI initiator in production / heavy load?
>> Or does somebody have experiences with Dell MD3000i?
>> One thing is "poor performance" ~ 60 - 70MB/s depending on RAID level
>> used. (poor performance compared to plain SATA disk which have 110MB/s -
>> both tested for reading as it is our planned load - multimedia streaming
>> and downloads)
>> The other thing is some problem with compatibility of initiator and Dell
>> If I setup RAID 5 'Disk Group' consisted of 4x 1TB SATA drives (in
>> MD3000i) and then created for example 2 'Virtual Disks', both are
>> detected by iscontrol and added to /dev/ as da0 and da1, but da1 spams
>> log with messages like this:
>> Can somebody advice some tweaks to get better performance and solution
>> of the errors above?
> hi Miroslav,
> firstly, in case you haven't yet, get the latest from:
> the slowness is probably due to the scsi errors, which I need some scsi expert
> (hence the cc to scsi at freebsd.org, hint, hint).
> In the mean time, and if you can/want, you can allow me access to an iscsi
> so that I can better debug the issue.
> oh, and yes, we use it here.
thank you for your reply. I will test iSCSI 2.2.3 and if it fails, I
will give you an access to the machine to let you debug the errors.
Thank you again!
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