Hi, by path is ok after reboots, even after disk change
for difference btween 0000:00 and 0000:03 maybe see the numbers produced by lspci ;) I have quite the same setup here: pci-0000:07:01.0-scsi-0:0:0:0 disk belongs of course to 07:01.0 RAID bus controller: 3ware Inc 9xxx-series SATA-RAID despite the possible change in the order of sd[a-f] you're safe IMO when using by-path Cheers Michal PS: /dev/disk/by-id$ ls -1 | wc -l 104 /dev/disk/by-path$ ls -1 | wc -l 21 never had problems of that kind despite many volumes On Mon, Jan 9, 2012 at 14:35, Carsten Aulbert <carsten.aulb...@aei.mpg.de> wrote: > Hi > > again, I'm struggling to get a problem with setup-storage solved. One of our > machines has 8 hard drives, 4 of them are connected to a 3ware controller and > set to export two logical devices. Additionally, there are 4 identical hard > drives attached, i.e. I expect sda..sdf which I get. > > The problem is, how do i get the setup-storage configuration file set-up > correctly and generic enough to work also a second time in a couple of month, > if one of the disks has been replaced? > > The problem is: > > * I cannot use sda...sdf as these may change upon reboot - checked and this > happens > > * in by-id I have scsi-SATA_Hitachi_HUA7210_GTE200P8G3JYGE for the 4 drives > (well except the final characters as these are based on its serial number), > while the 3ware controller is scsi-3600050e0f0998500d158000028c10000 and > scsi-3600050e0f0998500d1580001e8960000 > > * by-uuid is not of much help > > * by-path is interesting, but is this > > lrwxrwxrwx 1 root root 9 Jan 9 13:17 pci-0000:00:1f.2-scsi-0:0:0:0 -> > ../../sda > lrwxrwxrwx 1 root root 9 Jan 9 13:17 pci-0000:00:1f.2-scsi-1:0:0:0 -> > ../../sdd > lrwxrwxrwx 1 root root 9 Jan 9 13:17 pci-0000:00:1f.2-scsi-2:0:0:0 -> > ../../sde > lrwxrwxrwx 1 root root 9 Jan 9 13:17 pci-0000:00:1f.2-scsi-3:0:0:0 -> > ../../sdf > lrwxrwxrwx 1 root root 9 Jan 9 13:17 pci-0000:03:00.0-scsi-0:0:0:0 -> > ../../sdb > lrwxrwxrwx 1 root root 9 Jan 9 13:17 pci-0000:03:00.0-scsi-0:0:0:1 -> > ../../sdc > lrwxrwxrwx 1 root root 9 Jan 9 13:17 pci-0000:05:00.0-scsi-0:0:1:0 -> > ../../sr0 > > > really stable across reboots? > and then how does one differentiate between > pci-0000:03:00.0-scsi-0:0:0:0 and > pci-0000:00:1f.2-scsi-0:0:0:0 > > (3ware first device and first stand-alone disk)? > > Anyone knows how to tackle this? > > In the end I want to have the system on 3ware device one, then once FS on > 3ware device 2 and finally a software raid across the 4 disks. > > Cheers > > Carsten -- Michal Dwuznik
