raid controller

I‘ve CentOS Linux and FreeBSD based server running using 3Ware (9650SE-2LP) RAID card. I know how to check hard disk behind Adaptec raid controllers, but how do I look at ATA / SATA disks behind 3ware SCSI RAID controllers using smartctl command?

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I can use the smartctl -d ata -a /dev/sdb to read hard disk health status directly connected to my system. But, how do I read smartctl command to check disk SAS / SCSI behind Adaptec RAID controller from the shell prompt?

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I‘ve fast RAID-10 disk subsystem with multiple SCSI disks. Apps running under modern Linux kernel don’t write directly to the disk. They write it to the file system cache which is managed by Linux kernel virtual memory manager. Since I’ve high performance RAID controller I need to decrease the number of flushes. How do I tune virtual memory subsystem under Linux operating systems for better performance?

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How do I check the health of my 3ware RAID array under any Linux distribution? How do I access 3ware RAID Array web interface?

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