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"This system administration enhancement is new in the Developer 5/07 release.
The AHCI driver is a SATA framework-compliant HBA driver that supports various SATA HBA controllers that are compatible with the AHCI specification defined by Intel. Currently, the AHCI driver supports INTEL ICH6 and VIA vt8251 controllers, and hot-plugging functions."
Will it suffice if I can find a controller card with Intel ICH6, for a ZFS RAID?
Ok, I have talked to a salesperson and he states that PCI-X cards should work flawlessly in a plain PCI slot. Hence, that card should work without problem in a normal mobo, as long as it has PCI. Can anyone confirm this? He also stated that Solaris maybe requires drivers for the card - but as Solaris supports the Marvell chipset it should work without extra drivers, right?
Thanx for your reply! What would I do without your help?
As you said, a normal PCI at 32bit/33MHz has a peak transfer rate at about 133MB/sec. Which is not far from SATA II 150MB/sec, but it would be nice if I could get a full 150MB/sec - but it wont happen with this card, unless it is either 64bit or 66Mhz - then the transfer rate will increase to 267MB/sec http://en.wikipedia.org/wiki/List_of_device_bandwidths
If used correctly as a PCI-X card, the max theoretical bandwidth with this card is 1.07GB/sec, which should suffice for most people's need.
Anyway, I think I will go for an external SATA II card, that way I dont have to worry about picking the right non-server motherboard. If I want an external card, I have to resort to PCI or PCI-express on plain mobos. I dont know of SATA PCIe cards, so I guess the only alternative I have left is PCI cards. This card will follow me between my upgrades, from P4 now, to Penryn. I'll do a complete report here and keep you updated, how I set up a home computer with 4 drives in ZFS Raid. Maybe some other people will find it helpful...
Ok, the card works right out of the box. I use Solaris Express Community version build 67 and the card got detected automatically. Though windows XP required external driver - which I didnt install - that way I can not access the 500GB samsung discs from windows.
I booted up and created a zpool and it worked immediately. No problems. I disconnected one drive, and Solaris complained that one drive was faulted, but ZFS worked flawlessly, I could access my files and write to the zpool with only 3 drives. Then I reconnected the missing 4th drive and everything worked ok. ZFS is veeeery nice!
However, I have problem with very slow read/writes. One disc should reach 50-60MB/sec in windows XP. In zfs raid I get like 20-40MB/sec for the whole pool. And if I could from ntfs, I get like 100kb/sec. I am investigating this issue and will post here again...
PS. Jilliagre, why are the older posts deleted? Only two pages of Solaris posts can you read?
...However, I have problem with very slow read/writes. One disc should reach 50-60MB/sec in windows XP. In zfs raid I get like 20-40MB/sec for the whole pool. And if I could from ntfs, I get like 100kb/sec. I am investigating this issue and will post here again...
It seems that the 32bit P4@2.4GHz is causing the slowness. A modern 64bit CPU should allow for speeds in excess of 100MB/sec. For instance the dual core Opteron equipped X4500 with 48 hard discs allow read speeds at 600MB/sec