If we're not allowed to request product recommendations, apologies. If OK... I need a new main HDD (bay1) and duplicate to make mirror backups (bay2). I'm thinking Seagate Enterprise Capacity, 7200 rpm, 5 yr warranty, ST300NM0033 - because per Seagate they are Biz quality, more rugged, quiet with less vibration than typical home models like their Barracuda, hence the 5 yr warranty. I'm a home single user but leave my box on 24/7, so I love less vibration (all my 4 bays are filled), longer run time design. I don't Need the more expensive NAS raid version. It seems ideal for reliability and 24/7 use and a step up from the Barracudas I've used for years, which then had 5 yr warranties, but are now only 3 years. Can anyone recommend a better, more rugged, reliable, designed for 24/7 use, with 5 yr warranty, SATA internal drive? THANKS!