Hi Damon, before all, thanks for your complete answer.
I replaced a "failed disk", so now I have a "predictive failure". I understood, "googled" about "punctured strip" and found another cases of this problem. So I will replace the drive again and see the result of, if occur again I will reconstruct my array (raid 6). I will try it and back with the solution (or another questions =( ).. Thanks again!! Lucas. 2008/7/28 Damon L. Chesser <[EMAIL PROTECTED]> > On Mon, 2008-07-28 at 09:41 -0300, Lucas Mocellin wrote: > > Hi, > > > > I'm having some troubles with the DP SmartArray 6400 controller. > > > > Before I had a failed drive, so I repalced this drive, and now I'm > > getting this error: > > > > sp02:~# hpacucli > > => ctrl slot=4 pd all show > > > > Smart Array 6400 in Slot 4 > > > > array A > > > > physicaldrive 2:0 (port 2:id 0 , Parallel SCSI, 72.8 GB, OK) > > physicaldrive 2:1 (port 2:id 1 , Parallel SCSI, 72.8 GB, OK) > > physicaldrive 2:2 (port 2:id 2 , Parallel SCSI, 146.8 GB, OK) > > physicaldrive 2:3 (port 2:id 3 , Parallel SCSI, 146.8 GB, OK) > > physicaldrive 2:4 (port 2:id 4 , Parallel SCSI, 146.8 GB, > > Predictive Failure) > > physicaldrive 2:5 (port 2:id 5 , Parallel SCSI, 146.8 GB, OK) > > > > A "Predictive Failure", but I don't know what is this. > > > > I searched at google but without answers.. > > > > Can somebody help me? > > > > Thanks in advance, > > > > Lucas. > > Lucas, > > I am CCing you also as this could be very bad for you. > > I worked on Dell hardware, but I can tell you what a predictive failure > is. It is one of two things: > > 1. The smart hardware on the HD is reporting that the drive failure is > eminent. It may last for hours or months, but it is in a state that > says it is about to fail. > > 2. I don't remember what the chipset is for Dell raid controllers is, > but I bet it is the same mfg as HP. Sometimes when the meta-data gets > corrupted (after a failure and a HD is replaced) the strip is punctured > (google punctured strip). If this is the case, no matter what you do PD > 4 will never rebuild correctly and it will always report a predictive > failure. > > You did not say if you replaced pd4 or not. If you did, there is a > chance that pd4 is just bad. If you did not, there is a greater chance > that pd4 is bad. The only things you can do now is replace pd4 and see > if it rebuilds correctly. If it does not and still shows a predictive > failure there is only one recourse. Backup all the data. Break the > raid, rebuild the raid, restore the data. You MIGHT get away with > clearing the strip, then rebuilding the strip in the controller and in a > perfect world, all the data will be there. Slim chance. > > If your meta-data is corrupted, you are now gambling with your data. > With out respect to pd4 being in a predictive failure state or not, make > a complete backup and prepare for complete loss of that raid. A > punctured stripe means you have no parity to rebuild from. Or, to put > it differently, a bit of data was made into garbage, then copied as part > of the parity onto the strip. The corrupted parity strip faithfully > rebuild the array, only this time it included that piece of bogus data. > Everything will work just fine until the machine tries to access that > bit, expecting to find some sort of data it stored there, only to find > nonsensical data, then WHAM! Lock up. You can also experience > seemingly random HD failures, sometimes multiple hd will get kicked from > the array. Needles to say, this plays havoc with data preservation. > > This could be as simple as replacing pd4 and rebuilding (if it is just a > SMART error), or is could be a prelude to complete data lose. You have > to ask yourself, "Do you feel lucky, Well, do you?" > > The above was learned through two years working for Dell at the > Gold/Platinum level for server support. Failed HDs comprised about 80% > of the job. > > HTH > -- > Damon L. Chesser > [EMAIL PROTECTED] > http://www.linkedin.com/in/dchesser > >
