Hello. Unreadable media errors may not necessarily imply a bad drive. If your new drives are showing media errors after a recent rebuild, It is likely that you have a corrupted array as a result of a puncture. If this is the case, the unreadable media errors are logical but will continue to propagate throughout the array over time. The controller you have is a budget controller and does not have the ability to export a controller log for analysis of the possible puncture.  Here is what you can do. Perform a file level backup of your data. Do not use an image based backup. Save your OMSA hardware log for reference and then Clear the hardware logs before running the offline diagnostics via the F10 LCC. Replace any faulty drives that failed diagnostics. You must delete the entire affected Virtual Disk(VD). If this is your Operating System VD, then you will require a full OS re-installation. Procedure: It is recommended that you run consistency checks on all VD’s at least once of month during off-hours. This will reduce the chanced of a future puncture. Higher-end controllers like a PERC 6i will allow you to export a controller log and proactively monitor for uncorrectable bad blocks. Here is more information on Consistency Check and Background Patrol Reads. [URL] [URL]
Hi Our symptoms sound a bit like this thread  We're using SATA drives on a cabled system, not hot swap and we started seeing errors on a drive 3 weeks ago. That drive was 2 years old but then a much newer drive next to it, only installed in December started to give unreadable media errors so we replaced both of them. Before I even had a chance to do a warranty replace, both those new drives started giving errors and we've now closed down the server while we figure out what to do. We are going to try replacing the worst of the 2 but we think the problem lies elsewhere and we may get problems with these very quickly. We also put in a refurbed RAID controller (LSI SAS 6/iR), before the two new drives started to fail, but that hasn't helped. In fact, we are considering putting the original one back in. We think there's a problem between the drives and the RAID controller but no idea how to diagnose or resolve.
R410 Multiple drive failures in short period of time