I have just taken delivery of a DL380 with a P800 and an Storage Works 70 storage array. The server 2003 with SQL2005 designed to run two small disk intensive databases around 70GB each. So we asked for a array design splitting OS, Temp.db, Log files and Data onto separate arrays. Each database has its own log file array and data array. The design was based on Raid 1 for smaller arrays and Raid 10 for the larger arrays (4 and 6 drives).
The server turned up with Raid 5 for the larger arrays and when quizzing the engineer he said that the P800 when configured in a Raid 10 in fact does a Raid 5 with mirror. (Raid 5/1) . So there was little speed advantage and you were better off going for a larger Raid 5.
Is this actually the case. And if so what is the fastest way of configuring 4 and 6 drives on a P800 controller? Also does anyone know if 3 disk Raid 5 is faster than 2 disk Raid 1 on this controller?
The server turned up with Raid 5 for the larger arrays and when quizzing the engineer he said that the P800 when configured in a Raid 10 in fact does a Raid 5 with mirror. (Raid 5/1) . So there was little speed advantage and you were better off going for a larger Raid 5.
Is this actually the case. And if so what is the fastest way of configuring 4 and 6 drives on a P800 controller? Also does anyone know if 3 disk Raid 5 is faster than 2 disk Raid 1 on this controller?
