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Old 04-30-2014, 10:16 AM   #1
Registered: Jun 2009
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LVM attributes differences ?


Is there any difference or issues between the 2 lvs attributes as,

LV Size 10 GB
Current LE 1340732
Segments 12
Allocation inherit
Read ahead sectors auto
- currently set to 2048
Block device 253:139


LV Size 10 GB
Current LE 1340800
Segments 68
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:140

Also, what does follow means,

1. - currently set to ?
2. Block device 253:140 ?

Any help will be appriciated.
Old 04-30-2014, 11:09 AM   #2
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1.- currently set to ?

It refers to sector. A sector is a subdivision of a track on a magnetic disk or optical disc.Each sector stores a fixed amount of user-accessible data, 512/2048/4096 bytes. By default, the LVM label is placed in the second 512-byte sector.

2. Block device 253:140 ?

The underlying physical storage unit of an LVM logical volume is a block device such as a partition or whole disk

253:140 represents MAJ:MIN number (major:minor) of block device.

The lsblk command allows you to display a list of available block devices

#lsblk -l
check it using above command.
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Old 05-02-2014, 09:49 AM   #3
Registered: Jun 2009
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Thanks for the prompt response.



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