Hardware - OS course @ Telerik Software Academy
Windows Admins
K: , windows
K: exchange 2013 , management consola- e o, PowerShell...
4 Storage
LVM/SW RAID
Marian MarinovCEO of 1H [email protected]
Borislav VaradinovSystem Administratorbobi [ at ] itp.bg
Lame Vertical Move LVM
Logical Volume Manager... and why to complicate things?
LVM
LVM
LVM
LVM
LVM Structure
UUIDs
Physical Extent (PE)
Volume Groups (VG) max logical partitions
max physical volumes
PE size
Logical Volume (LV)
Logical Volume
Size (PEs or KB/MB/GB/TB)
Stripe (2N < PE size)
Mirror (multiple copies)
Snapshot (typically around 15%-20% of the original) chunk size
(64KB 1GB)
Thin Provisioning
RAID 1/4/5/6
LVM Commands
pvcreate/display/remove
vgcreate/display/remove/change
lvcreate/display/remove
Activate the LVM partitions
vgchange -a y
Linux Software RAID
MD device
Single command to rule them all - mdadm
Linux Software RAID
[root@beast ~]# cat /proc/mdstat Personalities : [raid1] md1 :
active raid1 sdc3[1] sda3[0] 58605056 blocks [2/2] [UU] md0 :
active raid1 sde1[1] 976759936 blocks [2/1] [U_] unused
devices:
UnitsSizeHDD Sectors512BytesHW RAID Blocks512B 8MBPartitions
Sectors512B (depending on the partition type)SW RAID Chunks64KB
1KB*2nPV Physical Extents 8KB 16GBVG Physical Extentsn * PELV
Chunks64KB 1GBFS Blocks1KB, 2KB, 4KB(depending on the FS type)
Only the HDD is with static size, everything else is with
variable size.
HDDHDDHW RAID
sda1sda2sda3HDD
sdb1sdb2
SW RAID
HW RAIDPV2PV0PV1PV3
Volume 0Volume 1
LV-homeLV-bootLV-mainLV-usr
Ext3Ext4Ext4Ext4
HDDHDDHW RAID
sda1sda2sda3HDD
sdb1sdb2
HW RAIDPV0PV1PV4
Volume 0Volume 1
LV-home1LV-bootLV-mainLV-home0
Ext3Ext4Ext4Ext4
SW RAIDPV2PV3
Recovery?
CGSecurity's TestDisk Download
DEMO
Links
LVMhttp://www.linux-mag.com/id/7454/
SW RAID 0 vs LVM Stripinghttp://www.linux-mag.com/id/7582/
SW RAID
HowTohttp://www.howtoforge.com/redundant-array-of-inexpensive-disks-raid-technical-paper
LVM HowTohttp://www.howtoforge.com/linux_lvm
Storage LVM/SW RAID
http://academy.telerik.com/student-courses/software-technologies/os-windows-linux/
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