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1
vote
1answer
291 views

Bind specific usb out

How can I bind specific usb out to specific /dev/sd* value? Each time that I plugged in some device in specific usb out it binds to different /dev/sd* location. How can I avoid it to set mounting ...
3
votes
4answers
3k views

Comparison of raw block devices

Is there a utility (or some shell magic) that allows me to compare two block devices? Details: I have one large (0.5 TB) RAID device that I've backed up to a slightly larger SATA device using dd. ...
5
votes
1answer
541 views

Unmounting HTC device takes forever

Not sure if should post this on Android SE because I don't think this is directly related to the Android OS. On my system I manually mount and umount my HTC device with these options in /etc/fstab: ...
11
votes
4answers
2k views

Is there a way to sync only one partition?

Is there a way to sync only one partition instead of all partitions? Something like "sync /dev/sdc1".
0
votes
1answer
357 views

block device usage and several mount points

There is some weird thing I don't understand: I have 2G block.img file with an ext4 filesystem inside. There is a 2G test.txt file in block.img. test.txt consists of letters 'a'. Then I mount ...
3
votes
2answers
1k views

Linux Mint: drives' map changing at reboot brings fstab error

I've set up fstab to auto mount media drives on a Linux Mint machine. The OS is installed on a IDE/ATA Disk while 3 SATA disks hold data to share. The BIOS has the ATA disk as first boot device. All ...
3
votes
2answers
1k views

How can I test whether a block device is read-only from /sys or /proc?

On a CentOS6 system I have /dev/block/sr0 (read only) and /dev/block/sda (read/write). How can I find out programmatically which devices are read-only? There is a ro file in there, but it's '0' for ...
2
votes
2answers
1k views

How do I get losetup -a to behave?

# losetup /dev/loop0 /tmp/tmpuUwgbn # losetup -a # losetup -f /dev/loop1 # losetup /dev/loop0 /dev/loop0: [0806]:33654 (/tmp/tmpuUwgbn) # ls -la /tmp/tmpuUwgbn -rw------- 1 root root 0 2011-08-24 ...
12
votes
2answers
2k views

Weight-based block IO control for VMs

I use KVM to manage my virtual machines. I am trying to limit the resources provided for VMs. I am able to limit the CPU and memory allocated for VMs using libvirt/cgroups. Now I want to control the ...
8
votes
3answers
3k views

Mounting multiple img files as single loop device

Is there a way to take a disk img file that is broken up into parts and mount it as a single loop device?
3
votes
2answers
322 views

raid 1/LVM at the level of directories (aka mknodding a directory)

I just experienced data loss, so I am interested in some form of data duplication. I was thinking of mdadm and companions to raid 1 through software. However, I just want a given, not too big ...
2
votes
2answers
311 views

Questions on using command mount

When using command mount for a device, I was wondering about the following questions: Since device file is a parameter to mount, how does one know what the device file for a device is in general? Do ...
5
votes
3answers
2k views

Detecting that a device is mounted to a particular folder?

As part of revamping my backup scheme, I'm now adding rotating external hard drives, keeping one safely off-site at all times while the other is receiving backup data. Naturally, to ensure that my ...
5
votes
1answer
970 views

How to determine if disk is compact flash or standard hard drive

I need to determine in a shell script if a given block device (e.g. /dev/sda) is a compact flash disk or a regular hard drive. Google did not help me out for once, and while udevadm info --query=all ...
3
votes
4answers
2k views

How to get size of a block special file? [duplicate]

I need to be able to determine the size of a block special file. For example, given /dev/sda, I need a command that will provide the size of the device. (By size I mean capacity, since this is a ...
6
votes
3answers
8k views

Prevent a USB external hard drive from sleeping

Does anyone know if there is an elegant way to tell an external usb drive not to spin down after a period of inactivity? I've seen cron based solutions that write a file every minute, but nothing ...
8
votes
2answers
519 views

Prevent disk renumbering on reboot in OSX

I have 3 physical drives in my Mac Pro with OSX 10.6.4. Occasionally after rebooting the machine, the disk numbering changes such that the /dev/disk# does not reference the same drive as it did before ...