#raid-controller

Fix: Do SAS expanders work transparently with SAS controllers? #programming #solution #fix

Do SAS expanders work transparently with SAS controllers?

I’m new to SAS expanders and I’m trying to get things right. I understand that SAS expanders, when used with SAS controllers which supports expanders, allows you to utilise the full capacity of supported drives on a controller.

However, say I’ve got a SAS controller with 4 x SSF-8087 ports, which by itself would support 16 disks. I could…

Answer: Why has VMWare ESXi 5 slow access to IBM M1015 / LSI 9240-8i RAID? #it #dev #solution

Why has VMWare ESXi 5 slow access to IBM M1015 / LSI 9240-8i RAID?

I am building server for virtualization and wanted to go with VMWare ESXi 5. I configured RAID10 on 4 disks connected to internal RAID controller IBM M1015 (identical to LSI 9240-8i) and installed ESXi without any problems. Only problem is that copying data to datastore (on the RAID array) on host is slow – around 20MB/s. And I…