On Tue, 2005-04-12 at 10:18 -0700, Rodre Ghorashi-Zadeh wrote:
> It seems to work now, but the funny thing is that it doesn't work when
> setting up the "target portal" on the MS-iSCSI initiator tab, but it works
try to add same lines before all targets as global parameters. a tcpdump
log can tell us everything.
> when I am logging on to an "available target". Is there anyway I can confirm
> it is working? Also, can you tell me what kind of overhead the checksumming
> puts on the system and what would be the impact of not using the
> checksumming feature.
u had better find out by uself. all data will go through the crc
algorithm, u can see the impact.
if u run it over wan, it had better be enabled.
>
> My iSCSI target systems are Quad Pentium Pro 200Mhz (i686) systems with
> 512MB RAM and Compaq smart2 RAID controllers (1 is a smart2/P and the other
> is a smart2/DH) hooked up to SCSI 2 Ultrawide disks (9GB) and tlan 100Mb
> NICs. I was hoping that you could tell me what would be an ideal ietd.conf
> for this layout. Thanks for all your help.
>
i am sorry that i can not tell. basically u network is slow 100Mb stuff,
so i do not think u will bounded by u 4 cpu. if u can get ~10MB/s, u are
fine.
ming
> ~ Rodre
>
> -----Original Message-----
> From: Ming Zhang [mailto:mingz@...]
> Sent: Monday, April 11, 2005 4:57 PM
> To: Rodre Ghorashi-Zadeh
> Subject: RE: [Iscsitarget-devel] iscsi-target 0.4.6 & CRC Checksum
>
> On Mon, 2005-04-11 at 16:40 -0700, Rodre Ghorashi-Zadeh wrote:
> > Hi, Thanks for your response.
> >
> > Ietd.conf:
> >
> > # Example iscsi target configuration
> > #
> > # Everything until the first target definition belongs
> > # to the global configuration.
> > # Right now this is only the user configuration used
> > # during discovery sessions:
> >
> > IncomingUser joe ch4m3l30n1234
> >
> > # Targets definitions start with "Target" and the target name.
> > # The target name must be a globally unique name, the iSCSI
> > # standard defines the "iSCSI Qualified Name" as follows:
> > #
> > # iqn.yyyy-mm.<reversed domain name>[:identifier]
> > #
> > # "yyyy-mm" is the date at which the domain is valid and the identifier
> > # is freely selectable. For further details please check the iSCSI spec.
> >
> > Target iqn.2001-04.com.example:storage.disk2.sys1.xyz
> > # Users, who can access this target
> > # (no users means anyone can access the target)
> > IncomingUser joe ch4m3l30n1234
> > # Lun definition
> > # (right now only block devices are possible)
> > #Lun 0 /dev/hdc fileio
> > Lun 0 /dev/ida/c0d1 fileio
> > # Alias name for this target
> > Alias Test
> > # various iSCSI parameters
> > # (not all are used right now, see also iSCSI spec for details)
> > #MaxConnections 1
> > #InitialR2T yes
> > #ImmediateData no
> > #MaxRecvDataSegmentLength 8192
> > #MaxBurstLength 262144
> > #FirstBurstLength 65536
> > #DefaultTime2Wait 2
> > #DefaultTime2Retain 20
> > #MaxOutstandingR2T 8
> > #DataPDUInOrder yes
> > #DataSequenceInOrder yes
> > #ErrorRecoveryLevel 0
> > #Wthreads
> >
> HeaderDigest CRC32C
> DataDigest CRC32C
>
>
> add this 2 line to u ietd.conf to see if works. default is none.
>
>
> >
> > I don't have a gui installed on this machine so I can't get ethereal
> working
> > and there doesn't appear to be a command line version. I tried to use
> > tcpdump piped to strings but it didn't return anything.
> >
> tcpdump -s 1600 -w logfile works
>
> > Also, /dev/ida/c0d1 is a hardware RAID device, should I not be using
> > blockio?
> fileio is fine.
>
> >
> > ~ Rodre
> > -----Original Message-----
> > From: Ming Zhang [mailto:mingz@...]
> > Sent: Monday, April 11, 2005 3:50 PM
> > To: Rodre Ghorashi-Zadeh
> > Cc: iet-dev
> > Subject: Re: [Iscsitarget-devel] iscsi-target 0.4.6 & CRC Checksum
> >
> > On Mon, 2005-04-11 at 15:34 -0700, Rodre Ghorashi-Zadeh wrote:
> > > Hello,
> > >
> > >
> > >
> > > I am using iscsi-target 0.4.6 on a linux 2.6.11.7 kernel with the
> > > crc32c and libcrc32c modules loaded. I am using Microsoft iSCSI
> > > initiator version 1.06 to connect to the target on WinXP Pro SP2. When
> > > I try and setup the CRC/Checksum settings (Data Digest & Header
> > > Digest) on the iSCSI initiator it I cannot connect. Does the iscsi-
> > > target support header and data digest checksumming?
> > yes, support.
> >
> > 1) post u ietd.conf here
> > 2) post a ethereal log here.
> >
> > thx.
> >
> > ming
> >
> > >
> > >
> > >
> > > Regards,
> > >
> > >
> > >
> > > Rodre Ghorashi-Zadeh
> > >
> > > Chief Systems Engineer
> > >
> > > Conduit Technical Environments Corporation
> > >
> > > 604.785.4888
> > >
> > >
> > >
> > >
> >
>
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