Here is what I found in a casual Google search: DASD device driver 2 3 S/390's disk devices (DASDs) are managed by Linux via the DASD device 4 driver. It is valid for all types of DASDs and represents them to 5 Linux as block devices, namely "dd". Currently the DASD driver uses a 6 single major number (254) and 4 minor numbers per volume (1 for the 7 physical volume and 3 for partitions). With respect to partitions see 8 below. Thus you may have up to 64 DASD devices in your system. 9 10 The kernel parameter 'dasd=from-to,...' may be issued arbitrary times 11 in the kernel's parameter line or not at all. The 'from' and 'to' 12 parameters are to be given in hexadecimal notation without a leading 13 0x. 14 If you supply kernel parameters the different instances are processed 15 in order of appearance and a minor number is reserved for any device 16 covered by the supplied range up to 64 volumes. Additional DASDs are 17 ignored. If you do not supply the 'dasd=' kernel parameter at all, the 18 DASD driver registers all supported DASDs of your system to a minor 19 number in ascending order of the subchannel number. 20
http://www.mjmwired.net/kernel/Documentation/s390/DASD Ray Mrohs U.S. Department of Justice 202-307-6896 > -----Original Message----- > From: [email protected] > [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] > Sent: Friday, October 20, 2006 3:15 PM > To: [email protected] > Subject: Re: PVCREATE Problem > Importance: Low > > I hate to say this, but if it is in /proc/dasd/devices, and > /dev/dasdbm1 > exists, and you are under 256 PVs for this VG, then I would look at > installing some maintenance. SP3 is pretty old by now, and > there was a > ton of stuff that got fixed between GA and SP3. > > > Mark Post ---------------------------------------------------------------------- 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
