QTY Dell 600GB 10K SAS 2.5" Enterprise Hard Drive HDD 7YX58 ST600MM0006 TestedThis drive tested at 100% HealthAll of our hard drives have been cleaned, wiped, and tested All of our hard drives are pre-owned and not newWe use Hard Drive Sentinal for testingHard Drive Sentinal gives a health rating for the driveWe do not list drives with a poor health rating, 95% - 100% onlyWe do not do block or sector testing as they are used drivesWe do guarantee them wiped and functional If you have specific needs, please ask us before purchasing