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2
votes
0answers
39 views

Does the LVM DM UUID contain any metadata?

For example within the name listed below is there any metadata within the name, eg based on server serial number or date created or such: ...
0
votes
1answer
193 views

Identifying RHEL disk other than by UUID in /etc/fstab for Disaster Recovery from another site

For our disaster recovery setup there is a set of disk which are replicated from our production site to the disaster site. On the production site the RHEL servers have /boot filesystem setup on disks ...
0
votes
1answer
33 views

How are BLKIDs Assigned?

Suppose I have a situation like I have installed /etc and /boot in two separate partition which belongs to an USB device , and the rest of the system / and /home in the HDD. Now my question is I need ...
7
votes
1answer
621 views

How to reference an NFS share by UUID in the client's /etc/fstab

I have the following NFS export on my server, with fsid set to a newly generated UUID. /etc/exports: /mnt/data client(ro,fsid=b07f5af6-6b10-11e3-b4c1-00248115724d) I would then run exportfs -rav ...
2
votes
1answer
166 views

Will UUID be the same if a disk moved from one machine to another?

While in Linux every disk got a UUID. I just wondering will the UUID be the same if I moved the same disk from one Linux box to another? Is it the same UUID in different machines with the same disk? ...
2
votes
2answers
91 views

VMware: identifying source template

Is there a way to identify a parent template for VMs. I've got a few VMs created from different templates and I need to confirm source template. I've tried blkid and dmidecode -s system-uuid but it ...
0
votes
1answer
137 views

fsck.ext3: Unable to resolve UUID but gparted shows the correct UUID

I'm running CentOS6 on a PowerSpecG211 with a RAID level 1 array (2x2TB) and a couple of SSD's Yesterday afternoon the partition for /var ran out of space while I was doing some stuff in mysql and ...
1
vote
1answer
100 views

Why /dev/disk/by-id/ change after a suddenly server power-off?

I'm management a server that in /etc/fstab have references to some partitions using /dev/disk/by-id/DISK_ID-partN. The server suddenly power-off and DISK_ID part of /dev/disk/by-id/DISK_ID-partN ...
1
vote
2answers
452 views

is there any advantage mounting an LV by UUID instead of by path?

I know I can specify mounts in fstab by either putting their path (like /dev/sda1 or /dev/mapper/myvg-logicalVolume1) or by fs label (LABEL=root) or by UUID (UUID=1234-5678-...). I see a clear ...
-1
votes
1answer
162 views

Are disk partition labels or UUIDS stored in the partition area itself or in some other area of the hard disk? [duplicate]

Are disk partition labels or UUIDS stored in the partition area itself or in some other area of the hard disk? e.g If the dd command is used is used to copy the raw partition image from one partition ...
4
votes
2answers
699 views

Converting Debian fstab to use UUIDs via linux-base?

We have a few Debian 5 systems that are still using /dev/hda in the fstab. We'd like to covert them to using UUIDs. This is supposed to be done automatically via the "linux-base" package (postinst), ...
1
vote
2answers
676 views

Change LUKS UUID (without cryptsetup > 1.2)

According to the cryptsetup changelog (1.2.0): Allow explicit UUID setting in luksFormat and allow change it later in luksUUID (--uuid parameter). My problem is that the current Debian ...
0
votes
2answers
3k views

how to know what is disk uuid for md raid1 and hdparm?

ive got md0 (raid 1) array and want to make write cache off on them during system boot (ubuntu 12.04 server). md0: /dev/sda /dev/sdc blkid: /dev/sda: UUID="3e502de5-696d-f4b4-470e-XXX" ...
1
vote
2answers
1k views

is it possible to simultaneously mount 2 LVM volumes that are exact copies of each other (same UUIDs)?

I have cloned (using dd) the hard drive in a live system onto several multiple backup hard drives. The root partition in the live system is a LVM volume. The backup copies are intended to be drop-in ...
1
vote
1answer
107 views

Is it possible to load new PostgreSQL libraries without restarting the server?

I need support for the uuid library in my Postgres server (a 64-bit Amazon Linux AMI). I've installed the uuid and uuid-pgsql packages. Is it possible to load the library without restarting the ...
4
votes
2answers
1k views

Repurposed disk - Linux blkid command returns incorrect information

I'm working with an SSD drive removed from a VMware ESXi installation. I'm trying to reuse the disk in an existing Linux installation (CentOS 6.2). The drive sits behind an HP Smart Array P410 RAID ...
1
vote
0answers
344 views

Imaging LVM-based Linux system to new computer: UUIDs change?

We are attempting to use Acronis TrueImage to copy the hard drive from one standalone Red Hat Enterprise Linux 5.5-based computer across to two others as part of a production operation. We are using a ...
-3
votes
4answers
2k views

How to check if UUID generated is correct? [closed]

My company get custom made motherboard from a vendor. Recently, we requested them to put UUID in our SMBIOS. They did it for us. According to them, they use a program to generate UUID Version 5 (SHA-1 ...
1
vote
1answer
2k views

LVM: regenerate a UUID?

I have some virtual machines which were clones of the same original disk image, which contained some LVM volumes. When I clone these, I end up with multiple LVM volumes (albeit on different hosts) ...
8
votes
3answers
3k views

How to create a randomly keyed, encrypted swap partition, referring to it “by-uuid”, on Debian?

It is sensible that if you have any sort of block device encryption implemented on your GNU/Linux system, to encrypt your swap partition too, as any decrypted data may be written in cleartext at any ...
2
votes
4answers
1k views

How to get the mount point of flash drive by using uuid?

I am beginner in ubuntu linux and i need to write simple bash script, that can identify necessary flash drive(which contains only one vfat partition) using uuid of this partition, and get the mount ...
5
votes
2answers
5k views

Change the UUID of a VHD

How can I change the UUID of a VHD-file? My problem is that VirtualBox won't accept the VHD-file if it has already been added. But I am moving VHD disks between work/home and cloning them (and ...
0
votes
2answers
880 views

Disks with identical UUIDs

I have three disks that make up a RAID-5. Mdadm repeatedly spat out the third disk (even after replacing it), so I took a closer look. After checking the cables, I eventually decided to label the ...
1
vote
1answer
1k views

Unable to create ramdisk after updating to 2.6.32

I've upgraded one of our servers (debian lenny) from backports. It upgraded the kernel to 2.6.32-trunk-amd64, and switched the disk access to UUID. Everything works fine, however, /dev/ram0 no longer ...
2
votes
1answer
2k views

/dev/disk/by-uuid not showing all disks

I am working with local storage repositories on an installation of XenServer and I am trying to use the UUID to delete a SR made in error. When I look at the disks by-id here is the output: ...
1
vote
1answer
427 views

SVN Merge two reposiories - what about the UUIDs?

This is my scenario: Originally had two seperate repositories, I need to merge these into one repository. I don't care too much about the history in these repositories. I created a new repository and ...
30
votes
7answers
20k views

How to create a UUID in bash?

In Java i can create a new random UUID with UUID uuid = UUID.randomUUID(); I now need to do the same within a bash script. Is there a command or library I could use?
2
votes
2answers
511 views

Using UUIDs for passwords

Does anyone have an opinion on using UUIDs as passwords? This is intended for accounts created for external users, such as customer access to private SFTP folders. Or are people using public key ...
2
votes
3answers
226 views

What security problems are caused by public MAC address knowledge?

What types of attacks are made possible or worse by having knowledge of a target computer's MAC address? I am planning on using a type 1 UUID generator that includes the generating computer's MAC ...
3
votes
2answers
3k views

PostgreSQL update problems with uuid

I am trying to run yum update on my CentOS 5.2 box and keep getting this message: Missing Dependency: libossp-uuid.so.15 is needed by package postgresql-contrib I ran yum update postgresql ...
6
votes
2answers
2k views

Where does Ubuntu store partition UUIDs on disk?

Exactly what part of the disk is a UUID stored on? MBR? Somewhere within the partition? Is it a calculated value, or randomly generated and recorded?