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--- linux_fs_mgm_lvm [2019/11/01 09:51] – [Add the disk to a volume group] andonovj
+++ linux_fs_mgm_lvm [2020/09/11 07:25] (current) – andonovj
@@ Line 1: / Line 1: @@
-======Create a File system======
+=====Overview=====
+File system management on Linux is pretty easy once a person has experience and knowledge of what he is doing.
+====File system Management====
+File systems can be two kinds:
+  * Non-Journal File systems: ext2.
+These file systems do not keep logs and can have corrupted data if there has been a power outage. The pluses of these file systems is their fast read/write speed.
+  * Journal File systems: ext3,ext4.
+These file systems keep a log (journal) which slows them down, however it is up to the System Admin to decide if he/she is willing to sacrifice speed for consistency.
@@ Line 479: / Line 489: @@
 So since restarting of the server isn't always possible to restart the server. Luckly we have a command for that:
-<sxh bash>
+<Code:bash|Re-scan SCSIs>
-/sys/class/scsi_host/host0/scan
+echo "- - -" > /sys/class/scsi_host/host0/scan
-/sys/class/scsi_host/host1/scan
+echo "- - -" > /sys/class/scsi_host/host1/scan
-/sys/class/scsi_host/host2/scan
+echo "- - -" > /sys/class/scsi_host/host2/scan
-/sys/class/scsi_host/host3/scan
+echo "- - -" > /sys/class/scsi_host/host3/scan
-</sxh>
+</Code>
 After that the disk should be available using fdisk: