Questions tagged [bbu]
The bbu tag has no usage guidance.
10
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Does the RAID BBU battery charge while server is powered off?
The title says it all. I am trying to troubleshoot a problem with the battery in a BBU RAID cache. During POST, an error is given something to the effect that the battery is low, the RAID cache is ...
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LSI iBBU07 troubleshoot: BBU not detected?
I have bought a used LSI iBBU07 for my LSI 3ware SAS 9750-8i RAID card. And now the card cannot detect the BBU even though I have seemingly installed it correctly.
I would like to know that:
Is ...
- 649
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Move raid10 from LSI 9750-8i to 3ware 9650SE-8LPML
This is a little risky task I want to try.
I have a 4 SATA III disks RAID10 array running on LSI (former 3ware) 9750-8i controller
with BBU (read and write cache enabled). In case of hardware failure ...
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3
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RAID10 Without BBU, With UPS
My datacenter says that each rack has primary and backup power on each rack. I assume this means there is a UPS for each server. Therefore, do I have any need of getting a BBU for the following setup?
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RAID Battery and UPS
I have a server with a UPS, life on battery is around 20-30mins, the server has a 2405/128MB without BBU, I am just confused as to do I really need a BBU card?
Surely if the UPS is working, during a ...
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Increasing occurrence of "BBU disabled" messages
Until recent my Intel RAID controller (SROMBSASMR) had a monthly occurrence of "BBU disabled: changing WB logical drives to WT", followed about 2 1/2 hours later by "Battery relearn complete".
Since ...
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Dell H700 Controller, BBU present but not charging...?
I have a new Dell R710 with a H700+BBU controller that is not charging.
Last week when I was looking at performance stats (and trying to figure out why write policy had changed from write-back to ...
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CentOS: How to tell if a server has BBU turned on? How many disks?
I got a new VPS. It's running CentOS 5.5.
The hosting company said some VPS nodes have RAID BBU while some don't.
How do I tell whether my VPS node has BBU or not?
Also is there a way to tell how ...
- 3,130
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3
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Benefits of a RAID BBU in addition to a double UPS + PS system
Today I roughly measured the benefits of enabling write-back on the RAID controller on a server at work. It got no RAID battery-backup-unit (BBU) so the write-cache is currently disabled. As the ...
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What is a (raid-controller-) BBU for?
I am wondering what's the purpose of a BBU. My first understanding was, that it enables the cache to write the data to the disc during a power failure. But some specifications say that a BBU can hold ...
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