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Re: Sudden File System Corruption

To: stan@xxxxxxxxxxxxxxxxx
Subject: Re: Sudden File System Corruption
From: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Date: Mon, 9 Dec 2013 23:24:04 +0100
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, Mike Dacre <mike.dacre@xxxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <52A61F3A.7040504@xxxxxxxxxxxxxxxxx>
Organization: Intellique
References: <52A03513.6030408@xxxxxxxxxxxxxxxxx> <CAPd9ww9hsOFK6pxqRY-YtLLAkkJHCuSi1BaM4n9=2XTjNVAn2Q@xxxxxxxxxxxxxx> <CAPd9ww9QzFWUnLtzkdktd+fSX9pdft+wL6cvG2MzLpSdLko1dg@xxxxxxxxxxxxxx> <52A191BA.20800@xxxxxxxxxxxxxxxxx> <CAPd9ww8+W2VX2HAfxEkVN5mL1a_+=HDAStf1126WSE33Vb=VsQ@xxxxxxxxxxxxxx> <52A302A9.9050509@xxxxxxxxxxxxxxxxx> <CAPd9ww8ovd1rOCQdjUF=U_ji2SOjyBCG-eFjeWSPXr8L5Zg9-A@xxxxxxxxxxxxxx> <52A401FF.9050506@xxxxxxxxxxxxxxxxx> <20131208160339.5c45ab91@xxxxxxxxxxxxxx> <52A5159F.2060309@xxxxxxxxxxxxxxxxx> <20131209014002.GP31386@dastard> <52A61F3A.7040504@xxxxxxxxxxxxxxxxx>
Le Mon, 09 Dec 2013 13:51:22 -0600 vous Ãcriviez:

> His Adaptec 51645 has a 1.2GHz dual core PPC RAID ASIC and is rated at
> 250K IOPS.  This figure probably includes some wishful thinking on
> Adaptec's part, but clearly the RAID ASIC is much faster than the
> Intel X25 SSD, which is universally known to be a very very low
> performer.

From my own benchmarks, I evaluated the real IOPS performance of these
cards at about 45K random 8K KIOPS. 

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