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--- content:serverbasics [2026/02/27 15:12] – [LVM] obel1x
+++ content:serverbasics [2026/04/10 10:18] (aktuell) – [Mountoptions] obel1x
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 </code>
 === LVM Error Recovery ===
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 . Repair the logical volume by searching for usable PVs automagically
-lvconvert --repair vgname/lvname
+lvconvert –repair vgname/lvname
 This should rebuild your logical Volume
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 . After rebuild, remove the faild drive from the vg:
-vgreduce --removemissing vgdata
+vgreduce –removemissing vgdata
 Thats it, your System should become usable after that.
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 If you have the possibility to add a new PV before the array gets degraded, you can use the replace- method after adding the new pv to the VG:
-lvconvert --replace /dev/sdX1 vgname/lvname /dev/sdY1
+lvconvert –replace /dev/sdX1 vgname/lvname /dev/sdY1
+=== More Info for LVMs ===
+https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/configuring_and_managing_logical_volumes/configuring-raid-logical-volumes_configuring-and-managing-logical-volumes
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 While autodefrag should not be necessary on ssd- harddiscs.
-For **Databases**  or files that need speed and __**are well backed up otherwise**__  : nodatacow,nodatasum,noatime,nodiratime
+For **Databases** or files that need speed and __**are well backed up otherwise**__  : nodatacow,nodatasum,noatime,nodiratime
 === Sources: ===
   * [[https://fedoraproject.org/wiki/Changes/BtrfsTransparentCompression|https://fedoraproject.org/wiki/Changes/BtrfsTransparentCompression]]
   * [[https://btrfs.readthedocs.io/en/latest/Administration.html|https://btrfs.readthedocs.io/en/latest/Administration.html]]
+=== Powermode settings ===
+Your Harddrives may have set a power level, that allows spindown. I personally would not let your harddrives spindown, because every start brings your harddrives mechanics nearer to death. In Fact there is not very much worse than spinning up and down every few minutes for a harddrive with physical discs.
+To change that, create the following file:
+<file>
+pcserver2023:/usr/lib/udev/rules.d # cat 85-hdparm.rules
+ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="[sh]d[a-z]", RUN+="/sbin/hdparm -S 0 -B 128 /dev/%k"
+</file>
+That way, your harddrives will stay up all time.
 ===== Quotas =====