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1794-Drive Array - Array Accelerator Battery Charge Low...

Jake Douglas
Occasional Visitor

1794-Drive Array - Array Accelerator Battery Charge Low...

I have received the above error message on and off since install of server back to 2006. In the event I need to replace the array accelerator will I lose Array configuration or will the "drives" write their configuration to the new array accelerator?

The array accelerator is in a DL380 G4
Smart array 6i version 2.58

One logical drive -mirrored (2 physical drives)

thanx
18 REPLIES
KarloChacon
Honored Contributor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

gregersenj
Honored Contributor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

" In the event I need to replace the array accelerator will I lose Array configuration or will the "drives" write their configuration to the new array accelerator? "

Replacing the accelerator, doesn't influence the configuration.
The accelerator, is only cache.
And in your case it's only the battery.

If you had to replace the Smart Array controller, then the new controller simply
read the configuration from the disks.
Configuration is stored on all drives, as meta data.

First follow Karlo's advice.
Jake Douglas
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

Guys,

Thanx for the great information and quick response.

-jake
J. K. Anderson
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

Given the advice, to update the 6i Controller up to 2.58 version, does anyone know if the response (posted write delay) to the condition (battery charge below 75%) exists prior to certain versions, but is just unreported? In other words, are there levels of firmware at which the issue occurs, but for which there is no system reporting of the error ... hence you are experiencing a "silent problem?"
gregersenj
Honored Contributor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

hmmmm. Havn't been able to find anything on that. But tha smart array controllers always disable write cache when the batteries is insufficiently charged.
And it will tell you that the write cache is disabled.

But why didn't you upgrade to the latest FW?
2.58 is minimum vertion.
James D. Young
Frequent Advisor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

I have the same problem, but I have the firware at 2.84. Support just sent me new batteries today and I have installed it. It does not appear to charge it or change the status, I am not sure which is happening.

Is there something I am missing here. The batteries are not hard to change.
lwright
Occasional Advisor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

I have been fighting this same issue on at least 5 DL360 G4 and 1 DL360 G4p servers since December 2007. I have updated the firmware to v2.84 and replaced the batteries and battery housings. The battery will recharge and last at most, one month, but as little as 3 days. I have contacted HP numerous times, but they continue to state that there is no known issue. I'm tired of chasing these 'battery' issues. Has anyone had any success in getting the batteries to recharge and STAY recharged?
Lamer_1
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

I've the same message on the new (just bought) server. The battery simply can't be discharged.

Please help me with this issue.

Server ProLiant ML350 G5.
JBonde
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

Our data center (2200 HP ProLiant servers) is currently dealing with around 100 of these battery issues that all started around early 2008. During this year we have probably had several hundred of these battery failure alerts. Unfortunately we haven't found any guidance from HP on this either. It is not just our data center experiencing this either, most of the other 6 data centers in my company have very similar issues.

In the past we always used to update the firmware to the latest available (I agree that 2.58 is the absolute minimum to address this issue, but there is no reason not to update to the latest available) and then monitor it. 7 times out of 10 just updating the firmware fixed the issue. When updating firmware was not enough, we would replace the battery and that fixed the issue 9 times out of 10. However, just this year we have had to start replacing the battery, the actual cache accelerator card (part number 413486-001 - SPS-BD,DDR,40Bit,128MB) and update the firmware or 7 times out of 10 the issue would come back.

We have done some extensive research on this issue. We understand that the battery only has a life of 3 years, so it is understandable that we may need to change the battery as our data center is now 5 years old. What is confounding us is that we can not just update firmware and replace the battery. 70% return failure rate if we don't also replace the cache accelerator card itself is not acceptable. But, that is what we have to do now to resolve these issues. That isn't as big a deal with the server in warranty, but with out of warranty servers the cost is something we have to take into account.

What that has done is made us look at cache acceleration itself, is it actually required on most of these servers. The conclusion to that is often times no. And I am more than willing to listen to advice or counter arguments on this. My feeling is that unless the server has sustained level of disk I/O (measured through perfmon Physical Disk %Disk_Time over several days) of 10% or more, we do not feel cache acceleration is of any benefit, and we recommend disabling the CIM trap alerts on the monitoring console for those servers and then either 1) disabling Logical Drive Array Acceleration through ACU or 2) Just remove the card and battery from the server. Not an ideal solution, but it does prevent a flood of trouble tickets.

So right now we do several days of analysis of each server reporting this problem, and make a determination based on disk utilization of whether we were going to replace the battery, card and update firmware or simply suppress the alert. Typically we feel SQL servers, MQ, Citrix and Terminal servers, some file servers are candidates for parts replacements. Web servers and other low disk I/O servers we just suppress the alerts and/or remove the card and battery.

I would like to see some response from HP on this, but every time I've brought it up previsouly we've just been given the standard pat answers about firmware, battery life etc. It seems to me something else is going on, these cards shouldn't go bad just because the battery dips below 75% charge.
Lamer_1
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

Thank you very much for the answer.
gregersenj
Honored Contributor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

When you're having these kind of problems.
"FW upgraded, batteries replaced, and it still fail..."
Then you should raise a case with HP support, and have them to elevate the case to a higher level.
Solutions may take a long time, they will ask you to upgrade everything, and ask you to send an endless number of logs.

Merry Christmas
/jag
david d_2
Frequent Advisor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

Any update on this issue? I am experiencing an 18% failure rate on the DL380 G4's that I am responsible for. F/W at 2.84 and new batteries don't seem to resolve this issue.

Thanks for any assistance,
Dave
ValeNT
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

2 David D

1) On "Battery Fail" first time - change the battery. Who nows, may be you are lucky man

2) After "Battery Charged Ok" (few hours or a day) just wait and pray...

3) On second "Battery fail" (if less than 1 months passed) change the cache module AND _do_not_ change the battery!

4) Order new battery and cache module.

p.s. in 1 of 10 times on 3) you need to replace battery too. so - be ready.
Rayb16
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

seeing this issue on a DL360 G4p. 2nd array battery. no change. removed battery today and checked voltage, it reads 1.8volts. the Battery is marked 3.6volts. I then powered up the server and tested the contacts in the battery holder, they measured 1.8volts.

So, either the array module that the battery plugs into is not charging the battery at the required 3.6volts, or the battery is supposed be a lower voltage battery (doubt it), or the array module is not supposed to charge the battery and is should hold a 3.6volt charge for a few years on its own.

I suspect the array module (accelerator) must be the culprit here. unless a firmware upgrade will actually change the output voltage from this array module.

Chris Dillon
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

I've just encountered this problem on a DL385 G1 with integrated SA6i and 128MB BBWC. It complained of a bad cache battery so I bought a new one (system is out of warranty) and plugged it in. I noticed that after several hours it still hadn't reached a charged state so I put a multimeter on the battery-holder terminals with the battery removed and only measured 2.5V output. With the battery installed it dropped to 2.2V and steadily rose about 10mV per second. You can't charge a 3.6V battery with only 2.5V! I'll be trying a new cache module next.
Rayb16
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

Replacing the Array Accelerator Board has fixed this issue, it has solved the problem on two servers.
Glenn Buck
Occasional Visitor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

I have been troubleshooting this issue on ONE of 4 DL380's I have at one site for months:

1) I updated the 6i to the latest firmware - no luck

2) I replaced the battery - no luck

3) I replaced the battery a second time thinking that the first replacement battery was old stock, bad, etc - no luck

4) I replaced the cache module and battery (again) and cleared NVRAM - no luck
At this point - the post message stated that the cache battery was not fully charged

5) I allowed the server to run for 24 hours and powered down - removed battery - and verified that there was 3.6 volts at the battery - so the warning is clearly incorrect. Also at this point - the post message changed and stated that the cache battery had FAILED (as opposed to simply stating that the battery was not fully charged as it did immediately after changing the cache module and battery).

At this point - I'm leaning toward simply removing the cache module and battery as this server is simply a BDC that does not do a great deal other than running BackupExec and off site backup client. But I do have a fair amount of time invested in this issue and would like to find a solution.
Wayne
Frequent Advisor

Re: 1794-Drive Array - Array Accelerator Battery Charge Low...

Third time we have this BBWC problem now with DL380 G6 server and 410i, replaced the battery with a new one, but after 3 days the ESX4.1 sensors still tell us "partially charged" warning message.

In fact there is still not a HP System Management Homepage available for ESXi4.1 we have to trust the ESXi sensors and believe them the battery is still not fully charged.

So next step would be to replace the cache module.

These battery problems since years is very annoying.