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Is there any options to force the PCIe SSD during install to be not /dev/sda? I was hoping to reserve the SSD to be limited to be only /var but the grub loader fails each time when I try to set the bootable partition to be /dev/sdc2 (sdb is usb install drive).

I have been installing on Dell r610 and HP DL385 G6 servers using both CentOS 6.6 and Ubuntu 14 and the PCI device always shows up before the raid devices.

ewwhite
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Alan
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  • read about udev and udev.rules – Navern Aug 25 '15 at 21:00
  • This looks very much like an XY question. Your problem is not that your SSD is called /dev/sda but what you want to use it for. Your SSD being assigned to /dev/sda does not prevent using it exclusively for the /var filesystem. – Tilman Schmidt Aug 25 '15 at 21:45
  • @TilmanSchmidt, maybe because of the age of the bios, but it doesn't boot from PCIe, so even if I install it there (which will happen during install) it will fail when it comes time to actually boot. – Alan Aug 25 '15 at 22:26
  • I fail to see what all this has to do with the device names your various storage devices are assigned. You need to install your operating system and boot loader on a device your BIOS is able to boot from. IIUC in your case that means a RAID device which you have in your server alongside the PCIe SSD you mention in your question. Whether that RAID is named /dev/sda, /dev/sdb or /dev/sdc is irrelevant. If there's a problem with installing Linux on your RAID you need to fix that problem. Trying to rename the devices is unlikely to help. – Tilman Schmidt Aug 26 '15 at 11:05

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I wouldn't eff with udev rules for this. Modify your install scripts (preseed or kickstart) to ignore /dev/sda.

See: Consistent Install Disk Selection in RHEL Kickstart

Also, is there any way you can run a network install. USB installation of the OS is fraught because of SCSI enumeration issues.

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ewwhite
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  • Thanks Edward, I will look at preseed, it looks interesting. I haven't ever done a network install, but there isn't any technical reason I can't do it. For what it is worth I switched the PCI Slot I was using to be the last one where PCI 1&2 were for the SAS and PCI 3 was for the SSD. When I booted into the CentOS installer the SSD was recognized as /dev/sdd. – Alan Aug 25 '15 at 22:39