Ah! I see what you meant. Yes, he was using EDEV. Neat stuff, EDEV. VM talks to the SAN and presents FBA to the guest. Wouldn't it be ... "elegant" ... if the storage vendors presented FBA to the System z host?
-- R, Ingo Adlung <[EMAIL PROTECTED]> Sent by: Linux on 390 Port <[email protected]> 08/08/2006 04:33 PM Please respond to Linux on 390 Port <[email protected]> From Ingo Adlung <[EMAIL PROTECTED]> To [email protected] cc Subject Re: ECKD vs FBA problem on MF Linux Lpar > Wow ... such an interesting suggestion. You mean, Ingo, that EMC might > speak FBA on the IBM "channel"? Hi Rick, when you sneak through Mike's initial mail (snippet) > lsdasd > 0.0.0100(ECKD) at ( 94: 0) is dasda : active at blocksize 4096, > 546840 blocks, 2136 MB > 0.0.0101(FBA ) at ( 94: 4) is dasdb : active at blocksize 512, 524288 > blocks, 256 MB > 0.0.0102(ECKD) at ( 94: 8) is dasdc : active at blocksize 4096, 54000 > blocks, 210 MB > 0.0.0406(FBA ) at ( 94: 12) is dasdd : active at blocksize 512, > 71454720 blocks, 34890 MB > I am able to go into yast and creat an LVM and Filesystem, > but when I do a mkinitrd it thinks the DASD is an ECKD device instead of > FBA, this is wrong ? it suggests for exactly this being the case - i.e. my brain can't be that off :-) While I remember that we had heart about this feature some years ago I don't think we ever had an EMC box to test with ourselves. If we could nail down the problem Mike describes it could certainly become a nice add-on feature :-) Best regards, Ingo -- Ingo Adlung, STSM, System z Linux and Virtualization Architecture mail: [EMAIL PROTECTED] - phone: +49-7031-16-4263 Linux on 390 Port <[email protected]> wrote on 08.08.2006 19:29:00: > Wow ... such an interesting suggestion. You mean, Ingo, that EMC might > speak FBA on the IBM "channel"? > > I have tried, and tried, and tried to get the storage vendors and/or > in-house storage management teams to present FBA (eg: 9336) on the > channel. I get the "deer in the headlights" response every time. They > just don't seem to know what disk is if it isn't CKD. Oh ... SAN, maybe, > but that's on a different wire. Plug the same system into an IBM > processor and it must be CKD (3390, maybe 3380). > > It would be a great boon to all of us (VM, VSE, Linux) if EMC and STK > and IBM would give us an FBA handle on SAN volumes. Think about it! SAN > on one side, which can talk to z/VM and to zLinux, but also to Solaris, > AIX, Windows, but then also FBA to z/VM and to zLinux as FBA without > EDEV overhead. (Don't get me wrong: EDEV is great, but it's a hack, and > it's heavy.) > > The CKD "wrapper" around the data which all DASD vendors now appear to > mandate (if using an IBM strand of fibre) is overhead. The disk system > must wrap-up the data; Linux and CMS (even CP to some extent) must then > un-wrap it. Overhead on both ends. [sigh] Why is it that turning off > this overhead is such a difficult concept to grasp? > > -- R, > > > > > > Ingo Adlung <[EMAIL PROTECTED]> > > Sent by: Linux on 390 Port <[email protected]> > > > > > 08/08/2006 01:05 PM > Please respond to Linux on 390 Port <[email protected]> > > From > Ingo Adlung <[EMAIL PROTECTED]> > To > [email protected] > cc > > Subject > Re: ECKD vs FBA problem on MF Linux Lpar > > > > > > > I'm confused. I think to recall that with EMC storage subsystems you > could surface SCSI disks as FBA disks, hence the fba discipline of the > dasd device driver would detect it and take care of it ... is this the > use case described initially? > > In this case zfcp would be completely out of the picture ... > > Best regards, > Ingo > > -- > Ingo Adlung, > STSM, System z Linux and Virtualization Architecture > mail: [EMAIL PROTECTED] - phone: +49-7031-16-4263 > > Linux on 390 Port <[email protected]> wrote on 08.08.2006 18:57:51: > > > That looks like you don't have the zfcp kernel module on your system. > > What does: > > find /lib/modules/`uname -r` -iname "*zfcp*" > > show you? > > > > > > Mark Post > > > > -----Original Message----- > > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of > > Michael Harvey > > Sent: Tuesday, August 08, 2006 12:30 PM > > To: [email protected] > > Subject: Re: ECKD vs FBA problem on MF Linux Lpar > > > > > > Another question on same issue, let me know if you can help. > > > > When I try to 'MAP' the FBA disk using the 'ZFCP' module this is what > > I get > > : > > > > LNOUC4D:~ # insmod zfcp map="0x0406 0x01:0x50060482ccb539c8 > > 0x0:0x0107000000000000" > > insmod: can't read 'zfcp': No such file or directory > > LNOUC4D:~ # > > > > Can see what I am missing ! > > Thank You. > > > > ---------------------------------------------------------------------- > > For LINUX-390 subscribe / signoff / archive access instructions, > > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or > visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
