Computer data storage - RAID - LSI notes

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Computer data storage
This article/section is a stub — probably a pile of half-sorted notes, is not well-checked so may have incorrect bits. (Feel free to ignore, fix, or tell me)

LSI have different ranges of RAID hardware. Keep in mind that different drivers and tools may apply.

For example

  • Fusion-MPT is an el cheapo, RAID0 and RAID1 only motherbord chip, e.g. useful to mirror your system disk, but not much else
  • MegaRAID is the few-hundred-dollor, moderately fancy'n'fast plugin card kind

The chips sound similar. For example, the latest Megaraid I saw was based on the LSI 2208, the Fusion an LSI 2308.


Megaraid notes

Megacli notes

This article/section is a stub — probably a pile of half-sorted notes, is not well-checked so may have incorrect bits. (Feel free to ignore, fix, or tell me)

Needs to be run as root.

For me, it failed silently even when I did - which turned out to be a version problem. You probably want to download the latest MegaCli

If you get

MegaCli: error while loading shared libraries: libncurses.so.5: cannot open shared object file

Then you're probably on a 64-bit (or mixed) system and want to use MegaCli64 instead (or install lib32ncurses5(verify))


Silence active alarm: (I like my ears and concentration)

MegaCli64 -AdpSetProp AlarmSilence -aALL 


Specifying things:

  • -Lx
    refers to virtual device x
  • --PhysDrv [E:S]
    refers to
    • E is enclosure number, S is slot number.
If you have multiple enclosures, then
MegaCli64 -EncInfo -aALL
may be nice
...but in general, both enclosure and slot are listed in things like
MegaCli64 -LDInfo -Lall -aALL


Overview:

# encosure info:
MegaCli64 -EncInfo -aALL
# adapter info & general settings 
MegaCli64 -AdpAllInfo -aALL

# LD/virtual device list:
MegaCli64 -LDInfo -Lall -aALL
# PD/physical device list 
MegaCli64 -PDList -aALL | less
# (there's also an overview of both:)
MegaCli64 -CfgDsply -aALL


Drive management


See also:


MegaRAID BIOS notes

To enter this graphical interface, press Ctrl-H when it mentions that you can.


If it's beeping and you like your sanity, first go to Controller properties and find the "Alarm Control" dropdown (in the third page, so press Next twice first), find "Silence" (not Disable!), and click the Submit button.