I am trying to install 6.2 on a machine. I am using PXE as I have done so a number of times. My hard disk is being detected as sdb and not sda. My kickstart config is wanting it at sda. There are no other disks in the unit. It has and SD slot and an esata although BIOS does not appear to have a disable for either of those devices. Is there anyway to "force" the disk to sda ? or find out what its detecting at sda and disable that from the PXE boot line? Doing " dmesg | grep sda" does say SCSI removable disk. So how can I tell linux to NOT include that when installing? Thanks, jerry
On 02/03/2012 12:24 PM, Jerry Geis wrote:> I am trying to install 6.2 on a machine. > I am using PXE as I have done so a number of times. > > My hard disk is being detected as sdb and not sda. > My kickstart config is wanting it at sda. > > There are no other disks in the unit. It has and SD slot and an esata > although BIOS does not appear to have a disable for either of those > devices. > > Is there anyway to "force" the disk to sda ? > or find out what its detecting at sda and disable that from the PXE > boot line? > > Doing " dmesg | grep sda" does say SCSI removable disk. > > So how can I tell linux to NOT include that when installing? > > Thanks, > > jerryUsing the kernel boot option "nousb" lets me install. However, that also stops my usb keyboard from working. I just need to know how to block the usb-storage driver from loading. I tried "rdblacklist=usb-storage" but that did not work. What am I missing? Thanks, Jerry
Hello Jerry, On Fri, 03 Feb 2012 12:24:14 -0500 Jerry Geis <geisj at pagestation.com> wrote:> I am trying to install 6.2 on a machine. > I am using PXE as I have done so a number of times. > > My hard disk is being detected as sdb and not sda. > My kickstart config is wanting it at sda. > > There are no other disks in the unit. It has and SD slot and an esata > although BIOS does not appear to have a disable for either of those devices. > > Is there anyway to "force" the disk to sda ? > or find out what its detecting at sda and disable that from the PXE boot > line? > > Doing " dmesg | grep sda" does say SCSI removable disk. > > So how can I tell linux to NOT include that when installing?I noticed that behaviour with my CentOS6 (installed and kept up-to-date using yum). This happened since kernel kernel-2.6.32-220.el6.x86_64 and furthers updates. Was working as expected (my laptop's hdd mounted as sda) with previous kernels, up to kernel-2.6.32-131.21.1.el6.x86_64. I wonder if that behaviour, and the *change* of behaviour is an issue that should be reported, and how to handle it on installed systems! For now, I'm either booting w/ no USB disk plugged, or booting a 2.6.32-131 kernel. Regards, -- wwp -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: not available URL: <http://lists.centos.org/pipermail/centos/attachments/20120203/f9dfe4e3/attachment-0005.sig>
On Feb 3, 2012, at 1:34 PM, wwp <subscript at free.fr> wrote:> Hello Jerry, > > > On Fri, 03 Feb 2012 12:24:14 -0500 Jerry Geis <geisj at pagestation.com> wrote: > >> I am trying to install 6.2 on a machine. >> I am using PXE as I have done so a number of times. >> >> My hard disk is being detected as sdb and not sda. >> My kickstart config is wanting it at sda. >> >> There are no other disks in the unit. It has and SD slot and an esata >> although BIOS does not appear to have a disable for either of those devices. >> >> Is there anyway to "force" the disk to sda ? >> or find out what its detecting at sda and disable that from the PXE boot >> line? >> >> Doing " dmesg | grep sda" does say SCSI removable disk. >> >> So how can I tell linux to NOT include that when installing? > > I noticed that behaviour with my CentOS6 (installed and kept up-to-date > using yum). This happened since kernel kernel-2.6.32-220.el6.x86_64 and > furthers updates. Was working as expected (my laptop's hdd mounted as > sda) with previous kernels, up to kernel-2.6.32-131.21.1.el6.x86_64. > > I wonder if that behaviour, and the *change* of behaviour is an issue > that should be reported, and how to handle it on installed systems! > For now, I'm either booting w/ no USB disk plugged, or booting > a 2.6.32-131 kernel.You can try disabling USB disk support in the bios. -Ross
Hello Reindl, On Fri, 03 Feb 2012 23:19:26 +0100 Reindl Harald <h.reindl at thelounge.net> wrote:> > > Am 03.02.2012 23:02, schrieb wwp: > > An aspect of the problem w/ that behaviour change introduced w/ recent > > kernel updates, is that some mount mapping tables (fstab for instance) > > are broken if they rely on mount order (sda, hda, etc.) instead of > > device ID or label. > > if they are doing so they are broken all the time by design > > the last 10 years i saw no single machine not using LABEL and > the last 4 years no single one not using UUID, even in my RAID10 > i can plug any disk whereever i wantInteresting.. my habits seem very old then :-). A long time after setting up my CentOS6, I decided to create a partition in extended area for my personal data, and to automount it at boot. This is done in fstab with: /dev/sda8 /storage/data ext4 noatime,nodiratime 0 0 (see how I rely on sda, silly me!) I grabbed the UUID from `lshal` and replaced it in fstab: UUID=005374e2_5c18_437d_84d8_8069868fe54e ext4 noatime,nodiratime 0 0 .. no luck, it doesn't automount at boot. I think I'll have to investigate or get another brain update. Regards, -- wwp -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: not available URL: <http://lists.centos.org/pipermail/centos/attachments/20120203/f50e29ec/attachment-0005.sig>
Leonard den Ottolander
2012-Feb-04 00:29 UTC
[CentOS] install detecting disk as sdb not sda
Hello wwp, On Fri, 2012-02-03 at 23:31 +0100, wwp wrote:> I grabbed the UUID from `lshal` and replaced it in fstab: > UUID=005374e2_5c18_437d_84d8_8069868fe54e ext4 noatime,nodiratime 0 0 > > .. no luck, it doesn't automount at boot. I think I'll have to > investigate or get another brain update.Or just add the mount point to that entry :) . Regards, Leonard. -- mount -t life -o ro /dev/dna /genetic/research