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#1
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DL380 G5 - split backplane?
I have a brand new DL380 G5 with both SATA (factory fit) and SAS
(add-on) controllers. The drive backplane is connected to the controller with two data cables. How is it wired internally? Can I mix SAS and SATA on the same backplane, connecting the left part of the backplane to the SAS and the right part to the SATA controller? If not: what is the purpose of the two data cables? They can't actually run into the same bus on the backplane, can they? cheers Heimo -- You never ask questions when God's on your side. |
#2
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DL380 G5 - split backplane?
"Heimo Hetl" wrote in message ... I have a brand new DL380 G5 with both SATA (factory fit) and SAS (add-on) controllers. The drive backplane is connected to the controller with two data cables. How is it wired internally? Can I mix SAS and SATA on the same backplane, connecting the left part of the backplane to the SAS and the right part to the SATA controller? If not: what is the purpose of the two data cables? They can't actually run into the same bus on the backplane, can they? cheers Heimo -- You never ask questions when God's on your side. Each drive runs on its own channel, so there is no split backplane per-se. You should be able to mix SATA and SAS drives in the same chassis, but why would you want to? SATA drives have a 50% duty cycle, and are warrantied for only a year. There is no good reason to use SATA in any realtime production capacity, plus it appears that there is a lack of managability with them. SATA is also limited to 1.5Gb/s while the SAS drives are rated for 3.0Gb/s. They also outperform U320 by an appreciable margin. - LC |
#3
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DL380 G5 - split backplane?
"Heimo Hetl" wrote in message ... I have a brand new DL380 G5 with both SATA (factory fit) and SAS (add-on) controllers. The drive backplane is connected to the controller with two data cables. How is it wired internally? Can I mix SAS and SATA on the same backplane, connecting the left part of the backplane to the SAS and the right part to the SATA controller? If not: what is the purpose of the two data cables? They can't actually run into the same bus on the backplane, can they? SAS = good. SATA = ****e SAS = server. SATA = PC SAS = production SATA = test The only reason for SATA is cost. AND you do not need the performance and reliability of SCSI (now SAScsi) I'd expect that the 'add-on' controller is a P400 or a P600. You can still use both SAS and SATA disks with these (I think), and I reckon that technically, you can mix them. From experience, keep to what you're familiar with, set standards and keep them, and stick to SAS. |
#4
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DL380 G5 - split backplane?
"Nut Cracker" wrote in message ... "Heimo Hetl" wrote in message ... I have a brand new DL380 G5 with both SATA (factory fit) and SAS (add-on) controllers. The drive backplane is connected to the controller with two data cables. How is it wired internally? Can I mix SAS and SATA on the same backplane, connecting the left part of the backplane to the SAS and the right part to the SATA controller? If not: what is the purpose of the two data cables? They can't actually run into the same bus on the backplane, can they? cheers Heimo -- You never ask questions when God's on your side. Each drive runs on its own channel, so there is no split backplane per-se. You should be able to mix SATA and SAS drives in the same chassis, but why would you want to? SATA drives have a 50% duty cycle, and are warrantied for only a year. There is no good reason to use SATA in any realtime production capacity, plus it appears that there is a lack of managability with them. SATA is also limited to 1.5Gb/s while the SAS drives are rated for 3.0Gb/s. They also outperform U320 by an appreciable margin. - LC One more thing ... If for some unimaginable reason you chose to run both SAS and SATA disks in the server, at the same time ... you must use a SAS controller. SAS can host SAS and SATA drives ... a SATA controller can only host SATA. The DL380G5 comes with a P400 (PCIe SAS), no SATA controllers for this machine. - LC |
#5
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DL380 G5 - split backplane?
Nut Cracker wrote:
Each drive runs on its own channel, so there is no split backplane per-se. Thanks for clearing this up. (one might point out that in fact, the backplane is split into 8, making it as split as can be... Seems like I missed the departure of the SCSI bus. cheers heimo -- You never ask questions when God's on your side. |
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