I know many of us here manage RAID on our CentOS based servers so this may be of interest to us all.
I ordered three new “Enterprise hard drives” this month from a well known UK online retailer. The drives arrived as new in their anti-static packaging. Before using one of the drives in a mission critical hardware raid I checked the SMART attributes and was amazed at what I saw; see a few of the attributes listed below
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail – 2600
9 Power_On_Hours 0x0032 098 097 000 Old_age – 2106
12 Power_Cycle_Count 0x0032 100 100 000 Old_age – 80
198 Offline_Uncorrectable 0x0030 196 196 000 Old_age – 398
200 Multi_Zone_Error_Rate 0x0008 180 180 000 Old_age – 4077
So for a brand new packaged drive this was a bit of a surprise. “2106”
power on hours, obviously should be zero for a new drive and “398”
“Offline_Uncorrectable sectors” this is a well used and faulty drive. I
contacted the (very well known) manufacturer of the drive and asked for information on the serial number. I was told the serial number of the drive was region specific to the USA and should not even be in the UK. I
opened and tested the second and third drives with similar results. I was told two of the drives had already been returned under warranty and replaced with new drives. Wow… I was also told by the online retailer this is known as a grey import and is not that uncommon..
So it may be a good policy to check the SMART attributes of drives before deployment!