Date: Wed, 16 Dec 2009 15:57:27 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> To: Daniel Braniss <danny@cs.huji.ac.il> Cc: freebsd-scsi@freebsd.org, freebsd-stable Stable <freebsd-stable@FreeBSD.org> Subject: Re: iSCSI initiator and Dell PowerVault MD3000i Message-ID: <4B28F557.6000305@quip.cz> In-Reply-To: <E1NKoB6-000CQP-Ko@kabab.cs.huji.ac.il> References: <4B281279.6060706@quip.cz> <E1NKoB6-000CQP-Ko@kabab.cs.huji.ac.il>
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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 >> MD3000i. >> >> 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: > ftp://ftp.cs.huji.ac.il/users/danny/freebsd/iscsi-2.2.3.tar.gz > the slowness is probably due to the scsi errors, which I need some scsi expert > (hence the cc to scsi@freebsd.org, hint, hint). > In the mean time, and if you can/want, you can allow me access to an iscsi > partition > so that I can better debug the issue. > oh, and yes, we use it here. > > danny Hi Danny, 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! Miroslav Lachman
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