The Larger They Are, The More durable They Fall
It was instructed many a few years in the past, that as the dimensions of HDDs and the RAID arrays they’re a part of enhance, there’ll come a time the place it’s inconceivable to not have unhealthy bits. The sheer variety of bits in a petabyte array signifies that at the least a few of the drives have unhealthy sectors and sure ones they don’t even learn about. As with portray an extremely lengthy bridge, by the point a self scan has accomplished there will probably be new issues arising within the sectors it started the scan with.
Whereas this won’t cease arrays from rising, it definitely shortens the lifespan of the drives within the array. Backblaze noticed a report from Safe Knowledge Restoration that discovered the common MTBF was 2 years and 10 months. They questioned the accuracy of the findings, because of the comparatively small pattern dimension and the upsettingly brief lifespan. Because it seems, SDR was being beneficiant because the 17,155 failed HDDs Backblaze examined died in a mean of two years and 6 months!
Their checks encompassed 72 totally different fashions and excluded failed boot drives, drives with no SMART information, or drives with out-of-bounds information. Take a look at the models tested and the number of failures over at Ars Technica.
Discussion about this post