August 16, 201312 yr Hi all, I am a newbie in Unraid and I try to connect the m1015 to RES2SV240 expander card. I just wonder which type of cable should I use? CBL-SFF8087-06M or CBL-SFF8087SB-06M? Is there any different? Thanks a lot. Beside, If I connect both channels of m1015 to RES2SV240, is there a serious negative effect on the throughput, e.g. parity check? Thanks again.
August 16, 201312 yr Hi all, I am a newbie in Unraid and I try to connect the m1015 to RES2SV240 expander card. I just wonder which type of cable should I use? CBL-SFF8087-06M or CBL-SFF8087SB-06M? Is there any different? Thanks a lot. [/Quote] ..the first one is without SideBand support (leads), the second is with SB, hence the model number. When you employ an enclosure that supports it, you need the ones with SB...it does not harm to use these cables in an enclosure that does not offer support for that. Beside, If I connect both channels of m1015 to RES2SV240, is there a serious negative effect on the throughput, e.g. parity check? no, you're loosing 4 ports and can only connect 20 16 drives. In theory this should result in a faster cpnnection between M1015 and Expander, since you have full bandwidth between the two. However, with unRAID, I doubt that you would feel/see a difference, unless you're building your array out of SATA-III SSDs. The "standard" usecase for this is, to connect two M1015 with one cable each to the same expander. This is called multipathing and offers another level of redundancy. When one card fails, the second connection will still hold and the array is available....the OS / driver needs to support that too and I don't know if unRAID/Linux does. BTW: your expander has got a FW too: http://lime-technology.com/forum/index.php?topic=25412.msg221179#msg221179
August 17, 201312 yr Author Hi all, I am a newbie in Unraid and I try to connect the m1015 to RES2SV240 expander card. I just wonder which type of cable should I use? CBL-SFF8087-06M or CBL-SFF8087SB-06M? Is there any different? Thanks a lot. [/Quote] ..the first one is without SideBand support (leads), the second is with SB, hence the model number. When you employ an enclosure that supports it, you need the ones with SB...it does not harm to use these cables in an enclosure that does not offer support for that. Beside, If I connect both channels of m1015 to RES2SV240, is there a serious negative effect on the throughput, e.g. parity check? no, you're loosing 4 ports and can only connect 20 16 drives. In theory this should result in a faster cpnnection between M1015 and Expander, since you have full bandwidth between the two. However, with unRAID, I doubt that you would feel/see a difference, unless you're building your array out of SATA-III SSDs. The "standard" usecase for this is, to connect two M1015 with one cable each to the same expander. This is called multipathing and offers another level of redundancy. When one card fails, the second connection will still hold and the array is available....the OS / driver needs to support that too and I don't know if unRAID/Linux does. BTW: your expander has got a FW too: http://lime-technology.com/forum/index.php?topic=25412.msg221179#msg221179 Thanks for the explanation, CBL-SFF8087-06M and CBL-SFF8087SB-06M look the same. I will connect m1015 and RES2SV240 by using CBL-SFF8087SB-06M as the price is the same. I just have 3 SS-500 cases, so 16 drives is quite enough in this stage. Thanks for the FW info, I will upgrade it following your post. However, my m0105 is still running (LSI 9210-8i IT) FW, do I need to upgrade to P15-IT or P16-IT too? Will there be nay performance gain? It seems that the steps is not so difficult, http://lime-technology.com/forum/index.php?topic=26774.0
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