05-24-2011, 09:09 AM
Not recommended: Astaro on consumer class grade SSD
Although Astaro does not recommend to use SSDs to install ASG on it, I tried it as some consumer class SSDs were named on the inofficial Hardware list in this forum. Our Astaro installation for about 50 users on a 10 Mbit/s symmetric Internet connection worked flawlessly for years running on a single 60 GByte Hitachi harddisk. Now I replaced that harddisk with a 60 GByte OCZ Vertex2 SSD, without changing anything else. We don't use the http proxy (Web Security) on Astaro and neither Mail security or Web Application Security.
The result was, the system failed within one week. The kernel reported I/O errors on the SSD device and switched the filesystems to readonly mode. After system restart, no operating system was found, the SSD was dead. On a test system that SSD was readable again, but I didn't made any further tests on it and replaced it with a 80 GByte intel 320 SSD of similar price (130€), which means same architecture with MLC flash, although enhanced with capacitor to prevent data loss on power failure.
That system failed again after just one week with the very same symptoms, but this time the intel 320 SSD was really dead. It reported only a size of 8 MByte even on another test hardware!
The conclusion is, that the I/O load created by the logging within Astaro, with many parallel and distributed small write accesses is overloading any cheap solid state storage device. It might be the missing TRIM command which consumer class SSDs are expecting from the operating system, but I'm not sure on that.
I don't know if more expensive pro or enterprise grade SSDs of about 400€ for 60 GByte would survive longer.
Don't use consumer grade SSDs for Astaro!
4 UTM / ASG V9 for about 100 users
Last edited by isenberg; 05-24-2011 at 09:13 AM.