I was trying to migrate a Solaris x86 VMware VM to Xen source, but after move all data and turn on the machine in XEN, I received this error message and a panic:
cannot mount root path
after some searches i found this solution in vmware communities, valid as well for me.
Let's imagine you have changed the default boot disk, as well as the SCSI controller, you have moved from VMware with a specific SCSI device to XEN with another different SCSI device, but your bootarchive looks like it was Read more...
OS Categories
Where almost everything resides.
Sometimes, if you modify the MBR of a x86 disk you can loose its content so you need to reinstall the grub again, for example after install a mixed linux/solarisx86 environment, or migrating a x86 physical machine to a virtualized environment.
You have two options to boot the system, both using the CD-Rom:
One is using the cdrom grub, to do that, press e after grub appears, and delete all the lines and add the next 3 lines:
root (hd0,2,a)
kernel /platform/i86pc/multiboot
module /platform/i86pc/boot_archive
As Read more...
Nowadays most of servers come with two or more network interfaces to allow load balancing or fault tolerance. Debian supports bonding interfaces in the next way. Is recommended running these commands from the console.
Install first ifenslave utilities
# apt get install ifenslave-2.6
Stop networking running:
# /etc/init.d/networking stop
Now add the modules to be loaded editing the file /etc/modprobe.d/bonding with next lines
alias bond0 bonding
options bonding mode=1 miimon=100 downdelay=200 Read more...
A generous customer gave me an old Compaq 7 disk array and a single port UltraSCSI module to troubleshoot some RAID5 configurations, here are the switch options to set provided by Alex Daniels.
Module: DS-BA35X-FA is a Single port, single-ended UltraSCSI personality module
for BA356. Although these settings cover the single or dual
port(DS-BA35X-FB) variants.
It has two sets of switches as you have observed (S3 and S4).
S3 (SCSI Address switch) - When shelf bus address switches Read more...
Basic Commands
Checking status of drive/arrays, displaying all raids and basic information
# cat /proc/mdstat
Detailed status of array
# mdadm --detail /dev/md2
Creating raid device
# mdadm --create --verbose /dev/mdX --level=RAID5--raid-devices=2 /dev/sdj /dev/sdk
Stoping raid device
# mdadm --stop /dev/md2
Adding a drive:
# mdadm /dev/md2 -a /dev/sdm
Marking a drive as failed (This will break things if your not careful)
# mdadm --manage --set-faulty Read more...