Thread: [SSI-devel] Question about Shared Storage
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From: Andreas <ro...@co...> - 2004-07-26 15:59:24
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Hello I have a question about the usage of a shared storage. I have a SCSI-Raid with two connectors but only one controller. If I deactivate the intern termination of the raid and connect the raid with two hosts with the termination enable. Does that configuration work if I do not turn of the power of any of those two hosts? The raid I use has intern ATA-Drives and an SCSI-Controller for the connection (http://www.easyraid.com/main.htm) Do you think that this work? Andreas |
From: John B. <joh...@hp...> - 2004-07-26 18:05:35
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Andreas wrote: > Hello > > I have a question about the usage of a shared storage. I have a > SCSI-Raid with two connectors but only one controller. If I deactivate > the intern termination of the raid and connect the raid with two hosts > with the termination enable. Does that configuration work if I do not > turn of the power of any of those two hosts? The raid I use has intern > ATA-Drives and an SCSI-Controller for the connection > (http://www.easyraid.com/main.htm) Do you think that this work? > > Andreas > It has been a couple of years since I was really into the details of SCSI, but I think the answer is yes. As long as both machines have power, the terminators should have power. I'm not sure this is a long term solution though, sometime the power will be cycled and then what happens. The best people to ask about making a multi-initiator SCSI environment are the makers of the SCSI controllers. I also think there is a linux-scsi mailing list you might ask. John |
From: Andreas R. <ro...@co...> - 2004-07-27 12:56:43
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John Byrne wrote: > Andreas wrote: > >> Hello >> >> I have a question about the usage of a shared storage. I have a >> SCSI-Raid with two connectors but only one controller. If I >> deactivate the intern termination of the raid and connect the raid >> with two hosts with the termination enable. Does that configuration >> work if I do not turn of the power of any of those two hosts? The >> raid I use has intern ATA-Drives and an SCSI-Controller for the >> connection (http://www.easyraid.com/main.htm) Do you think that this >> work? >> >> Andreas >> > > It has been a couple of years since I was really into the details of > SCSI, but I think the answer is yes. As long as both machines have > power, the terminators should have power. I'm not sure this is a long > term solution though, sometime the power will be cycled and then what > happens. > > The best people to ask about making a multi-initiator SCSI environment > are the makers of the SCSI controllers. I also think there is a > linux-scsi mailing list you might ask. > > John Hello. I do not know if the failover with OpenSSI will work, but I was able to mount the raid from the two connected nodes after each other and reboot, power off the other node without any influence on the first one. I think my scsi-Adapter don't stop the termination if the power is turned of. Or the raid does automatic detect that. Wouldn't it be a good idea to create a list of the hardware that works? Everybody having a running system could list his used components. Only a suggestion ;-) Andreas > > > |
From: John H. <john@Calva.COM> - 2004-07-27 09:04:30
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Andreas wrote: > > I have a question about the usage of a shared storage. I have a > SCSI-Raid with two connectors but only one controller. If I deactivate > the intern termination of the raid and connect the raid with two hosts > with the termination enable. Does that configuration work if I do not > turn of the power of any of those two hosts? The raid I use has intern > ATA-Drives and an SCSI-Controller for the connection > (http://www.easyraid.com/main.htm) Do you think that this work? > Using the internal termination on the SCSI cards often causes problems - If you turn one of the machines off it's not clear if the termination is on or off. One solution is the (in)famous Y-cables, which are hard to find and expensive. Some external disk cabinets "just work" because they can tell that the machine has been turned off and do the termination themselves. Look to see if the doc for your box talks about cluster configuration. You also have to make sure that your SCSI device can cope with multiple initiators - some old drives used to get very confused if two hosts tried to talk to them. And, last, but by no means least, don't forget to change the SCSI ID on one of your hosts! I've often wasted hours on this. |
From: Andreas <ro...@co...> - 2004-07-27 09:43:40
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John Hughes wrote: > Andreas wrote: > >> >> I have a question about the usage of a shared storage. I have a >> SCSI-Raid with two connectors but only one controller. If I deactivate >> the intern termination of the raid and connect the raid with two hosts >> with the termination enable. Does that configuration work if I do not >> turn of the power of any of those two hosts? The raid I use has intern >> ATA-Drives and an SCSI-Controller for the connection >> (http://www.easyraid.com/main.htm) Do you think that this work? >> > Using the internal termination on the SCSI cards often causes problems - > If you turn one of the machines off it's not clear if the termination is > on or off. One solution is the (in)famous Y-cables, which are hard to > find and expensive. > > Some external disk cabinets "just work" because they can tell that the > machine has been turned off and do the termination themselves. Look to > see if the doc for your box talks about cluster configuration. > > You also have to make sure that your SCSI device can cope with multiple > initiators - some old drives used to get very confused if two hosts > tried to talk to them. > > And, last, but by no means least, don't forget to change the SCSI ID on > one of your hosts! I've often wasted hours on this. Hello. Before I can try to use the scsi device I have a problem with the module aic7xxx.o If I try to load it I get some unresolved symbols. scsi_unregister_module_Rsmp_81d85a75 scsi_unblock_requeuest_Rsmp_ef9396a5 and so on. I tryed to use the precompiled kernel and modules as well as my own compiled kernel - with the same result. Did anybody have the same problem? How can I find out where the problem comes from. Booting a Knoppix-Distribution from CD there is no problem with the module aic7xxx. So I think I is with the OpenSSI kernel? Andreas > > > > ------------------------------------------------------- > This SF.Net email is sponsored by BEA Weblogic Workshop > FREE Java Enterprise J2EE developer tools! > Get your free copy of BEA WebLogic Workshop 8.1 today. > http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click |
From: John H. <john@Calva.COM> - 2004-07-27 11:32:29
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Andreas wrote: > Before I can try to use the scsi device I have a problem with the > module aic7xxx.o If I try to load it I get some unresolved symbols. > > scsi_unregister_module_Rsmp_81d85a75 > scsi_unblock_requeuest_Rsmp_ef9396a5 > I had some kind of problem with aic7xxx.o, I can't remember exactly what it was. I "fixed" it by using aic7xxx_old.o, which works for me. |
From: Andreas R. <ro...@co...> - 2004-07-27 11:46:21
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John Hughes wrote: > Andreas wrote: > >> Before I can try to use the scsi device I have a problem with the >> module aic7xxx.o If I try to load it I get some unresolved symbols. >> >> scsi_unregister_module_Rsmp_81d85a75 >> scsi_unblock_requeuest_Rsmp_ef9396a5 >> > I had some kind of problem with aic7xxx.o, I can't remember exactly > what it was. > > I "fixed" it by using aic7xxx_old.o, which works for me. I will try that module. If I compile the support for scsi-tapes and disks direkt into the kernel it works fine. I found someone in a newgroup who had the same problem and did that too in order to solve it. Andreas > > > > > > |
From: Andreas <ro...@co...> - 2004-07-28 12:18:15
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Andreas wrote: > Hello > > I have a question about the usage of a shared storage. I have a > SCSI-Raid with two connectors but only one controller. If I deactivate > the intern termination of the raid and connect the raid with two hosts > with the termination enable. Does that configuration work if I do not > turn of the power of any of those two hosts? The raid I use has intern > ATA-Drives and an SCSI-Controller for the connection > (http://www.easyraid.com/main.htm) Do you think that this work? > > Andreas > > > > > ------------------------------------------------------- > This SF.Net email is sponsored by BEA Weblogic Workshop > FREE Java Enterprise J2EE developer tools! > Get your free copy of BEA WebLogic Workshop 8.1 today. > http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click Hello. I still have a problem with the shared storage. After I install Fedora on it the kernel (2.6) boot without any problems. Then I install OpenSSI and configure the first node. There are still no problems. I am able to list the content of every directory with ls. The problem is after I rebot the system with the openSSI kernel. If I type ls in the directory /usr/bin it hangs! I do not know what the problem is, but it allthough hangs if I boot it from the other node without openSSI kernel but also a 2.4.20 kernel. I think that it is either a problem with the kernel 2.4.20 or with the modules (aic7xxx.o) that is part of the 2.4.20 kernel. Does anybody know something about that? I think the problem accurs in directories that are to large or have to many files in it. The access any file in those directory is possible (/usr/bin/telnet can for example be executed). The hanging ls can always be stoped by presing STRG+C. Andreas |
From: Andreas R. <ro...@co...> - 2004-07-28 13:35:59
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Andreas wrote: > Andreas wrote: > >> Hello >> >> I have a question about the usage of a shared storage. I have a >> SCSI-Raid with two connectors but only one controller. If I >> deactivate the intern termination of the raid and connect the raid >> with two hosts with the termination enable. Does that configuration >> work if I do not turn of the power of any of those two hosts? The >> raid I use has intern ATA-Drives and an SCSI-Controller for the >> connection (http://www.easyraid.com/main.htm) Do you think that this >> work? >> >> Andreas >> >> >> >> >> ------------------------------------------------------- >> This SF.Net email is sponsored by BEA Weblogic Workshop >> FREE Java Enterprise J2EE developer tools! >> Get your free copy of BEA WebLogic Workshop 8.1 today. >> http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click > > > Hello. > > I still have a problem with the shared storage. After I install Fedora > on it the kernel (2.6) boot without any problems. Then I install > OpenSSI and configure the first node. There are still no problems. I > am able to list the content of every directory with ls. The problem is > after I rebot the system with the openSSI kernel. If I type ls in the > directory /usr/bin it hangs! I do not know what the problem is, but it > allthough hangs if I boot it from the other node without openSSI > kernel but also a 2.4.20 kernel. I think that it is either a problem > with the kernel 2.4.20 or with the modules (aic7xxx.o) that is part of > the 2.4.20 kernel. > Does anybody know something about that? I think the problem accurs in > directories that are to large or have to many files in it. The access > any file in those directory is possible (/usr/bin/telnet can for > example be executed). The hanging ls can always be stoped by presing > STRG+C. I did use the rescue system of fedora 2 after that and after mounting the fs I could access it with ls without any problems > > > > Andreas > > > |
From: Andreas <ro...@co...> - 2004-07-29 07:16:17
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Andreas wrote: > Andreas wrote: > >> Hello >> >> I have a question about the usage of a shared storage. I have a >> SCSI-Raid with two connectors but only one controller. If I deactivate >> the intern termination of the raid and connect the raid with two hosts >> with the termination enable. Does that configuration work if I do not >> turn of the power of any of those two hosts? The raid I use has intern >> ATA-Drives and an SCSI-Controller for the connection >> (http://www.easyraid.com/main.htm) Do you think that this work? >> >> Andreas >> >> >> >> >> ------------------------------------------------------- >> This SF.Net email is sponsored by BEA Weblogic Workshop >> FREE Java Enterprise J2EE developer tools! >> Get your free copy of BEA WebLogic Workshop 8.1 today. >> http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click > > > Hello. > > I still have a problem with the shared storage. After I install Fedora > on it the kernel (2.6) boot without any problems. Then I install OpenSSI > and configure the first node. There are still no problems. I am able to > list the content of every directory with ls. The problem is after I > rebot the system with the openSSI kernel. If I type ls in the directory > /usr/bin it hangs! I do not know what the problem is, but it allthough > hangs if I boot it from the other node without openSSI kernel but also a > 2.4.20 kernel. I think that it is either a problem with the kernel > 2.4.20 or with the modules (aic7xxx.o) that is part of the 2.4.20 kernel. > Does anybody know something about that? I think the problem accurs in > directories that are to large or have to many files in it. The access > any file in those directory is possible (/usr/bin/telnet can for example > be executed). The hanging ls can always be stoped by presing STRG+C. > > > Andreas I did use the rescue system of fedora 2 after that and after mounting the fs I could access it with ls without any problems Is it possible to use the kernel module from the 2.6 version in openSSI? Andreas > > > > > ------------------------------------------------------- > This SF.Net email is sponsored by BEA Weblogic Workshop > FREE Java Enterprise J2EE developer tools! > Get your free copy of BEA WebLogic Workshop 8.1 today. > http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click |