LVM - can both CKD and FBA reside in same volume group?
It's OK to use FBA disks in a LVM volume group that has CKD disks in it. If Make the FBA's LVM physical extent (PE) size the same as the CKD's PE size. - John Romanowski But if one of them is faster, you will be slowed down to speed of slower one of course. - Marian Thanks to both of you for your responses! susan zimmerman -- 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
Re: LVM - can both CKD and FBA reside in same volume group?
Once a Linux image is built, if additional space is needed we're hoping we can simply add the larger SCSI disk to the volume group. First comment is that Mother's Rule #1 (mix not data and system code lest peril ensue) applies here. It is a much better idea IMHO to have separate LVM spaces for data and system code. I am having a hard time finding information on mixing disk architecture in an LVM. Since the CKD is emulating FBA, does LVM even care that it is CKD as opposed to FBA? If you are truly running the box as FCP SCSI, then there is no CKD at all. VM emulates 9336 FBA devices on pure SCSI setups if you use emulation at all. FCP SCSI LUNs do not necessarily have emulation enabled -- you can choose to not use mainframe device emulation entirely if you have FCP storage, but you cannot manage that space with DIRMAINT or similar tools. Is anyone out there doing this? It's probably wiser not to mix emulated FBA and true FCP SCSI partitions in the same LVM. -- 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
LVM - can both CKD and FBA reside in same volume group?
Hi all, I'm new to this, so my terminology may be incorrect. We are primarily z/OS but have recently delved in to SuSE (SLES9) running as a guest under z/VM 5.1. Up until now we've used ECKD but will be installing a DS8100 formatted as FBA (SCSI over FCP). Cloning guests is painless and quick on CKD, but am told cloning FCP-attached SCSI Linux systems is more complicated. Currently our master image resides on 2 3390-9s , and except for /boot, is defined in one volume group. This relatively small system can then be propogated with each Linux instance needed. It takes about 30-45 minutes to create a new Linux image. Once a Linux image is built, if additional space is needed we're hoping we can simply add the larger SCSI disk to the volume group. I am having a hard time finding information on mixing disk architecture in an LVM. Since the CKD is emulating FBA, does LVM even care that it is CKD as opposed to FBA? Is anyone out there doing this? Thanks in advance for any help. Susan -- 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
Re: LVM - can both CKD and FBA reside in same volume group?
It's OK to use FBA disks in a LVM volume group that has CKD disks in it. If Make the FBA's LVM physical extent (PE) size the same as the CKD's PE size. This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by reply e-mail and delete the e-mail from your system. -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Susan Zimmerman Sent: Tuesday, October 10, 2006 12:59 PM To: LINUX-390@VM.MARIST.EDU Subject: LVM - can both CKD and FBA reside in same volume group? Hi all, I'm new to this, so my terminology may be incorrect. We are primarily z/OS but have recently delved in to SuSE (SLES9) running as a guest under z/VM 5.1. Up until now we've used ECKD but will be installing a DS8100 formatted as FBA (SCSI over FCP). Cloning guests is painless and quick on CKD, but am told cloning FCP-attached SCSI Linux systems is more complicated. Currently our master image resides on 2 3390-9s , and except for /boot, is defined in one volume group. This relatively small system can then be propogated with each Linux instance needed. It takes about 30-45 minutes to create a new Linux image. Once a Linux image is built, if additional space is needed we're hoping we can simply add the larger SCSI disk to the volume group. I am having a hard time finding information on mixing disk architecture in an LVM. Since the CKD is emulating FBA, does LVM even care that it is CKD as opposed to FBA? Is anyone out there doing this? Thanks in advance for any help. Susan -- 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
Re: LVM - can both CKD and FBA reside in same volume group?
But if one of them is faster, you will be slowed down to speed of slower one of course. Marian --- Romanowski, John (OFT) [EMAIL PROTECTED] wrote: It's OK to use FBA disks in a LVM volume group that has CKD disks in it. If Make the FBA's LVM physical extent (PE) size the same as the CKD's PE size. This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by reply e-mail and delete the e-mail from your system. -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Susan Zimmerman Sent: Tuesday, October 10, 2006 12:59 PM To: LINUX-390@VM.MARIST.EDU Subject: LVM - can both CKD and FBA reside in same volume group? Hi all, I'm new to this, so my terminology may be incorrect. We are primarily z/OS but have recently delved in to SuSE (SLES9) running as a guest under z/VM 5.1. Up until now we've used ECKD but will be installing a DS8100 formatted as FBA (SCSI over FCP). Cloning guests is painless and quick on CKD, but am told cloning FCP-attached SCSI Linux systems is more complicated. Currently our master image resides on 2 3390-9s , and except for /boot, is defined in one volume group. This relatively small system can then be propogated with each Linux instance needed. It takes about 30-45 minutes to create a new Linux image. Once a Linux image is built, if additional space is needed we're hoping we can simply add the larger SCSI disk to the volume group. I am having a hard time finding information on mixing disk architecture in an LVM. Since the CKD is emulating FBA, does LVM even care that it is CKD as opposed to FBA? Is anyone out there doing this? Thanks in advance for any help. Susan -- 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 __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- 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
