Not to disagree, but we have our own tape device driver that we ship with our ARCserve and Brighstor Enterprise Backup products, and it fully supports dynamic attach and detach of tape devices under VM. It's taken some coding, but we have this working with both Linux 2.2.16 and 2.4 kernels. We certainly did encounter some kernel bugs back on 2.2.16, but the more current 2.2 patch levels seem to work correctly, as do all of the 2.4 kernels.
Vince Re Computer Associates -----Original Message----- From: Post, Mark K [mailto:[EMAIL PROTECTED]] Sent: Saturday, July 06, 2002 12:07 PM To: [EMAIL PROTECTED] Subject: Re: tapes dynamical attache The tape driver does not support the chandev layer, so device detection is only done at boot time. The same is true for a 2.2 kernel, since there is no chandev layer at all. If you want to be able to use a tape drive on a Linux/390 system, the tape must be attached to the guest at boot time. It can later be detached and re-attached, but for device detection to happen it has to be there at boot. It would be nice if the chandev layer support would be added to the tape driver so that this would not be a problem. But, it's not there yet. Mark Post -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, July 05, 2002 8:08 AM To: [EMAIL PROTECTED] Subject: tapes dynamical attache Hello: I would like to dynamically add tapes to linux running under VM. If I attache tape device to a virtual machine using for example #cp att 330 * 181 and issue modprobe/insmod with specific tape adress - it doesn't work (although it works fine, when I attache tapes and later reboot linux). What should I do? Best regards -- Pozdrawiam, Michal Sierakowski Department of Technology PKO BP SA Warsaw
