Currently Being ModeratedFeb 1, 2011 3:27 PM (in response to Kris Cawthorn)The battery is there to save your data for up to 72 hours in case of a power failure while data is buffered on the RAID card (usually while check blocks are being calculated or checked) before being written to multiple disks.
Your RAID card will still function, but if the AC power drops, you lose the transfers in progress, with no hope of recovery.
Contact Apple for a new battery. It may be available as a kit, or you may have to get it sent to the store and bring your card in for a quick swap. Be sure you are talking about the right card -- there are two different ones for the Mac Pro and two different ones for the XServe.Beige G3, G4/867, G4/dual 1.25 MDD, MacPro'09 w cheap SSD, Mac OS 8.6 or Earlier, and 9.2, 10.5 and Server - LW IIg, LW 4/600, ATalk ImageWriter LQ
Currently Being ModeratedFeb 2, 2011 2:21 PM (in response to Kris Cawthorn)The controller disabled it's write cache, because without battery backup, I/Os would be lost if the system looses power. Your system will be pretty slow on writes until you replace the battery, but you won't loose any data.Mac Pro 2009, Macbook Pro 17" 2010, Mac OS X (10.6.6)
Currently Being ModeratedFeb 8, 2011 3:08 AM (in response to Kris Cawthorn)Hello,
Same problem 3 days ago.
Today and after a first reboot, Battery is good after 20mn of charge.
I have reboot 2 times more, and now it's good : Battery is OK.
May be the Battery is deficient, Apple support come this afternoon...
Sorry for my english, I'm french !G5 dual 2,8 ghz quad core, Mac OS X (10.6.6)
Currently Being ModeratedFeb 8, 2011 4:48 AM (in response to Prise2tete)The battery does re-condition itself every few months. It deeply discharges and then re-charges in an attempt to extend overall battery life and eliminate the "memory effect" problem of nickel-cadmium batteries. If you catch it while the battery is discharged and before it has recharged, it will be running with the cache disabled until the charge returns to a high enough level.
If it stays discharged, it needs to be replaced.Beige G3, G4/867, G4/dual 1.25 MDD, MacPro'09 w cheap SSD, Mac OS 8.6 or Earlier, and 9.2, 10.5 and Server - LW IIg, LW 4/600, ATalk ImageWriter LQ
Currently Being ModeratedFeb 8, 2011 5:48 AM (in response to Kris Cawthorn)FAQ: http://support.apple.com/kb/HT1346
Question: How often does the battery condition itself?
Answer: During normal operation, the battery will condition itself approximately every 3 months.
Question: Why am I receiving a warning "The Apple RAID Card installed in your system requires your attention" after rebooting?
Answer: If you do not clear out all alerts and warnings in Raid Utility, when the Xserve or Mac Pro reboots there will be a dialog box asking you to clear the warning. When all of the events are cleared, you will no longer receive this dialog on startup.Mac Pro 8800GTX Corsair F90 SSD, Mac OS X (10.6.5), 3.2GHz 10K VelociRaptors Win7 GTX 460
Currently Being ModeratedNov 28, 2012 9:58 PM (in response to Kris Cawthorn)
I'm getting "Battery failed (other than expired)" error.
Does this mean the battery is dead and has to be replaced??
If so, where is the best place to buy one?
Currently Being ModeratedJul 4, 2013 4:24 AM (in response to Kris Cawthorn)
I have the same problem too:
Battery failed (code 0x#0 = 18)
or in my case, I am german: Die Batterie funktioniert nicht (Code 0x#0 = 18)
It happened the first time after one year and I replaced the battery. One year later it happened again and I replaced the battery. And one more year later again. This time I decided not to replace the battery.
I booted the system from the recovery media and started the the raid utility from there and it said: battery charging.
So I returned to my "normal" partition and it said: battery charging.
A few days later: Battery failed (code 0x#0 = 18)
I repeaded this several times, always with the same result.
I was quite sure that all the trouble resulted from a firmware bug.
So I did shut down my Mac, and removed my raid card. On the raid card I disconnected the battery and waited a few minutes and reconnected it. I reassembled all and started my Mac.
It is running now for more than a month without any further errors.
Currently Being ModeratedJul 4, 2013 8:30 AM (in response to FrankOskar)
Look for this please: