On Wed, Sep 08, 2010 at 04:42:43PM -0400, Devin Bougie wrote: > Hi, All. We are seeing periodic I/O delays on a new large compute node ...
Hi, you do not say what your disks are (model number as reported by smartctl), but I have seen same symptoms as you describe with some WDC 2TB "advanced format" disks. The problem vanished with the next shipment of these 2TB disks, which also happen to have a slightly different model number. So I say, if you see disk delays, try different disks (different maker, different model, different capacity). -- Konstantin Olchanski Data Acquisition Systems: The Bytes Must Flow! Email: olchansk-at-triumf-dot-ca Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada
