johnm160 Posted November 9, 2011 Share Posted November 9, 2011 Writting to my cache drive is slower than I expected. I am averaging 27 - 32 MB/s utilizing about 20% of my Gb network. Before installing the Cache and Parity drives I was getting 50- 60 MB/s and utilizing about 50% of the network bandwidth. In doing a little investigating my motherboard has 6 sata ports, Cache and Parity are connected to ports 5 and 6, when I look at drive assignments in Unraid it shows Cache and Parity drives on IDE 3. I am not sure why those two ports show up that way but I am sure it probably has to do with chipset design. Could these ports being reported as IDE be causing the slow writes to the cache drive? Attached is a pic of drive assignments. Edit to add: Drive is a green drive, same as the green drives I use for data that I was getting almost double the write performance to before. Link to comment
sunny Posted November 9, 2011 Share Posted November 9, 2011 Hi, looking at the asus website it lists your motherboard as having 5 internal sata ports and 1 external, but maybe you have a new revision. 5 x SATA 3Gb/s ports (Use SATA1-3 for IDE mode.) 1 x External SATA (Does not support port multiplier) as well as mentioning that 1-3 are for ide mode, i know that they definitely should not be showing as ide inside unraid, i'd check your bios settings first. BIOS Setup Tips http://lime-technology.com/support/unraid-server-installation just starting out using unraid myself so i might be wrong, i'm sure someone more knowledgeable will be along soon to help you out. Link to comment
dgaschk Posted November 9, 2011 Share Posted November 9, 2011 Drives should be set to AHCI only in BIOS. Those are speeds to expected when writing directly to the array. Are the shares configured to use the cache drive? Link to comment
prostuff1 Posted November 9, 2011 Share Posted November 9, 2011 There is a setting in your BIOS that is setting those ports to emulate IDE. This was done for windows xp compatibility. Look for the setting in the manual and then change it in your motherboard BIOS. Link to comment
johnm160 Posted November 9, 2011 Author Share Posted November 9, 2011 @ Sunny, Sorry I swapped the motherboard for a different model and forgot to update sig, Asus M3A78 PRO @ dgaschk, If I set bios to AHCI The parity and cache drives are missing when the server boots @ prostuff1, Not that I have been able to find. Link to comment
prostuff1 Posted November 9, 2011 Share Posted November 9, 2011 @ dgaschk, If I set bios to AHCI The parity and cache drives are missing when the server boots This make sense, the server probably sees them different now (i.e. not as IDE drives) @ prostuff1, Not that I have been able to find. it is there somewhere Link to comment
johnm160 Posted November 9, 2011 Author Share Posted November 9, 2011 @ dgaschk, If I set bios to AHCI The parity and cache drives are missing when the server boots This make sense, the server probably sees them different now (i.e. not as IDE drives) @ prostuff1, Not that I have been able to find. it is there somewhere Well I might not be able to check it until tomorrow now. I just installed a new Corsair CX600 Builder series power supply and it is DOA. So much for UPGRADING my power supply. LOL Link to comment
Queball Posted November 9, 2011 Share Posted November 9, 2011 @ dgaschk, If I set bios to AHCI The parity and cache drives are missing when the server boots This make sense, the server probably sees them different now (i.e. not as IDE drives) Don't mean to highjack this topic but I have the same problem as the OP. Is it safe to change your BIOS to AHCI and then re-asign the drives back to there original positions from the web GUI? Thanks in advance. Link to comment
prostuff1 Posted November 9, 2011 Share Posted November 9, 2011 @ dgaschk, If I set bios to AHCI The parity and cache drives are missing when the server boots This make sense, the server probably sees them different now (i.e. not as IDE drives) Don't mean to highjack this topic but I have the same problem as the OP. Is it safe to change your BIOS to AHCI and then re-asign the drives back to there original positions from the web GUI? Thanks in advance. Yes Link to comment
johnm160 Posted November 9, 2011 Author Share Posted November 9, 2011 Ok Power supply issue resolved, seems I forgot to split the 8 pin ATX aux power connector and connect the four pin power connector. I set BIOS to AHCI again, and it seems I had to reassign the parity and cache like the poster above. When i reassign them the system dropped back to a 3 drive unregisterd system which scared the crap out of me! A quick reboot corrected that and I was able to reassing the parity and cache drives again. I am heading off to work so I will have to wait till tomorrow to see if speeds have increased, I will post results either way. Thanks for all of the help John Link to comment
Thornwood Posted November 9, 2011 Share Posted November 9, 2011 It seems you need the newest bios. Also ASUS some time does not show the 2 drives but unraid will be able to see it. Also look at the sub menu for the drives once you choose the AHCI Setting and make sure they are not set to IDE this will cause the drives not showing up. Link to comment
Queball Posted November 10, 2011 Share Posted November 10, 2011 Ok. I changed BIOS settings and here is a screenshot of the Devices page. Disk four is on an AOC-SASLP-MV8 8-Port SAS/SATA card. Motherboard is a Biostar A760G M2+. Is this ok, or should I still be concerned about Disk 4 - IDE? Link to comment
johnm160 Posted November 10, 2011 Author Share Posted November 10, 2011 Well since I am impatient I remoted into my desktop and transferred some files to the cache drive. Speeds are back up in the mid 40's which is a nice improvement. Link to comment
Joe L. Posted November 10, 2011 Share Posted November 10, 2011 Ok. I changed BIOS settings and here is a screenshot of the Devices page. Disk four is on an AOC-SASLP-MV8 8-Port SAS/SATA card. Motherboard is a Biostar A760G M2+. Is this ok, or should I still be concerned about Disk 4 - IDE? there is another BIOS setting you've not set... It is emulating an IDE drive for older Microsoft OS. (Earlier MS OS had no SATA drivers, so would not be able to be installed if an IDE drive was not present, so the BIOS emulates one. Often the emulation is slow, so you really don't want to use it if you can select the correct BIOS option.) Link to comment
johnm160 Posted November 10, 2011 Author Share Posted November 10, 2011 The "TYPE" screen from the bottom screen shot is where you select IDE/SATA, you might want to change it if it is on auto and not selecting correctly. Maybe you might want to manually select SATA from AUTO for all drives. Actually it might be in SATA device 4 in the top screen shot also, hard to say for sure without being able to click into it. Link to comment
Queball Posted November 11, 2011 Share Posted November 11, 2011 The "TYPE" screen from the bottom screen shot is where you select IDE/SATA, you might want to change it if it is on auto and not selecting correctly. Maybe you might want to manually select SATA from AUTO for all drives. Actually it might be in SATA device 4 in the top screen shot also, hard to say for sure without being able to click into it. OK. I figured it out. I didn't change the BIOS settings correctly the first time. The BIOS changes that worked for me were: Chipset > Southbridge Configuration > On Chip SATA Type > AHCI. Thanks for the guidance. Link to comment
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