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It's possible that the disks being read from to calculate the "resync" data are encountering some bad blocks during the process. Since you're using RAID50, if you encounter ANY bad blocks from any drive in the "half" (RAID5) that is rebuilding, it automatically results in a URE (referred to by Dell as a "puncture"). I say I suspect this because you're ...


The DELL PERC H730 is based on the LSI 3108 Chipset, and since this chipset supports disks larger than 2TB and SAS3 communications I can't see reasons for this controller won't work with those Seagate NL-SAS 4TB discs. What you should consider is the cabling used on this card, since SAS3 cards uses the new SFF8643 connector.


Yes you should change settings - read and write cache is probably disabled, back sure you have a UPS then go and enable write back caching and adaptive read caching (CTRL R on boot up, F2 for operations on the vdisk)


Found this while hunting for the same problem. Installing the package has the same output as the above, pkgadd -d MegaCli.pkg Warning: unable to relocate '$BASEDIR' mv: cannot move solmegacli-8.07.14/' to a subdirectory of itself,solmegacli-8.07.14//var/lib/dpkg/alien/solmegacli/reloc/solmegacli-8.07.14' mv: cannot move solmegacli-8.07.14/' to a ...


What specific errors are you receiving? I would recommend trying to get some more information from the PERC controller. With Ubuntu, you may not be able to install Dell's OMSA for monitoring and management. You could likely install MegaCLI and use it to export a controller log to get more info on events that are occurring. Is there a reason you haven't ...


Can you see the SMART information for the individual disks via the Disk Utility? Look at the Pre-Fail checks & see if anything stands out. This will indicate a failing physical device. Is the disk that's producing the errors in a RAID group with other disks? If not it may be the file system and not the drive or, depending on the layout, could be the ...


You have one drive in a RAID that is misbehaving, and producing occasional errors? Sounds like a hardware problem, and one that is likely to get worse. You should consider replacing the drive. Yes, it's expensive, but how much is your time worth, and how bad would it be if the entire drive went south at an inopportune moment?

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