Henri BR

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About Henri BR

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  1. Steve, this is the 'head' for the storage/server system. I followed the advice of separating the 'eggs' for better flexibility and to avoid the nuisances that a 9U chassis like that one could cause. So, we'll use a 3U chassis as 'head' and another 1 or 2 for the disks. I'm also following the advice and changing the MB to the SM X8DTH-6F. My fault not to mention it in my last post. Now I'm not sure if your (above) advice keeps the same. That's right, no RAID0. I was planning for the best here, not the worst. The 8 drives/bays in a SM SC835TQ-R920B, Chenbro RM31408 or similar design would be used for the server O/S backups, and our 5 computers backups – Nothing else for a while. Then we could buy an internal 5.25" enclosure for 4/6 2.5" drives to be used as boot and something else. Not sure about the optimal config, however. Would 2 15K SAS disks be better than 2 SSDs for boot/system in our case? As VMs guests are no more than 5, and also sporadically, would a single SSD be enough? For some thousands of files, I'm wondering about the fastest way to find/access something? Database in another SSD? Actually need a few tips about it. I'll try to find a similar chassis with an integrated expander. It would provide much more 'room' as the 8 build in drives/bays would be mostly not in use – Backups only – Maybe there's no need of RAID setup for those 8 disks (I mentioned 4 drives in RAID and plus other 4 drives controlled by the SATA2 ports because of the limitations of the mother board. Trying to figure out an optimal setup for the 'head' considering we won't need more than 15Tb to 30Tb of computers backups). What I know is that a chassis design like those 2 are very good for the needs. Considering the 'all the things' I don't know what exactly to do for the best performance and some level of reliability/availability. With regard to the chassis we talked before (posts 31 and 32), possible setups, and other subjects, lets see what SM answer this week. I started talking about that to check out your tips about what to do regarding to cabling setups for daisy chain, performance, 1 or 2 RAID cards, etc. But to talk about it, we probably to need to know what chassis we'll be using for disks, no?
  2. Oh Steve, it's also a comedy these undertakings. Changes here and there, something that didn't work (hopefully) start working, etc; we hardly know. I e-mailed them again with regard to these new LSI and their backplanes, and asking for some tests if possible. Hope they can do something. With regard to Chenbro, I already sent them 3 e-mails with different purposes and no answer until now - That's bad for a company... For the SM X8DTH-6F and a 8-Bays 3U chassis like the ones I mentioned with a 5.25" drive cage for other 6x/4x 2.5" drives, I though the following: LSI SAS 2008 Controller 8x Ports ------------------------------------- a. 2x SSDs, boot in RAID1 b. 2x SSDs, in RAID0 for cache, VMs, and/or whatever needed regarding to disk performance c. 4x 3.5" HDDs in RAID1 for critical non-shared/local data and server backups SATA2 (ICH10R) 6x Ports ------------------------------------- d. 4x 3.5" HDDs e. 2x for other like optical drive/eSATA w. Card Readers/Port Replicators Any advice for a better configuration or something that could work better? Or is it okay this way?
  3. Email: New answer from SuperMicro:
  4. At your first post, you were right when you said that it was more about a first generation list than a more specific solution. As you can see, we're about to use a chassis for the head/server separating it from storage chassis thanks to learning with you and reading more around there. One of the reasons about choosing that mother board was due to x16 slots for an higher end video card - Anyway, I've been reading that there's no significant performance differences between using a video card on a 16 lanes PCI and a x8 PCI; the difference is about 3% to 14% depending what you're doing. So, despite the X8DTH-6F MB has no x16 slots, it seems to be a very good MB from what I'm reading on its manual and some on-line contents. I'm wondering whether the integrated LSI SAS2008 will be a plus or a problem when we put other 1 or 2 RAID cards on it to work together - As I have never used RAID before, I'm really not sure about these kind of things; and here is why I'm telling it... The 2 chassis design I mentioned will provide us the ability to deal a little better with some of our demands. The 8 bays are enough to keep our five computers backups - If something goes wrong with a storage chassis or a RAID card, the data will be there available; hopefully. Also, there are some interesting enclosures that converts one 5.25" drive bay into six 2.5" hot-swap hard drive bays, like this iStarUSA BPU-126-SA, this Chieftec CTM-1062S, and this TT RC1600101A (Some options are 6Gb/s SAS/SATA and some are not; and just bear in mind that these 6-Bays cages are mostly for 9.5mm thickness drives). Those 6 drives are more than enough for the O/S in RAID1 using 2 SSDs, and other 4 drives for other purposes like O/S backups, cache, VMs, or whatever. The MB you mention fits perfectly here - 6x SATAII and 8x SAS6G. Sounds like you predicted it! You already told that there is no problem using 2 RAID cards on a MB. However I'm not sure there would be a problem using 2 identic RAID cards and plus the integrated MB RAID controler, which will be a different chip; and, in addition to to the onboard SATA ports. Is there any problem? SuperMicro has answered my email, and here it is their answer: No specific answer. I emailed them again trying to get more details and a specific answer to what we're looking for.
  5. I e-mailed them asking for compatibility between SC837E26-RJBOD1 and MegaRAID SAS 9285-8e. Another point I'm concerned is with regard to the motherboard. The SM X8DAH+-F is an enhanced extended ATX (13.68" x 13" (34.7cm x 33cm)) and it seems that it won't fit in many chassis. I liked this Chenbro RM31408 to be used as 'head', but it seems that the SM mother board won't fit in it. Is there a way to use that MB with this chassis? Have no idea Steve. And Chenbro didn't answer a single e-mail untill now, what makes me a bit worried about their support. A second chassis to be used as 'head' is the SM SC835TQ-R920B. This one I know it will fit, but not sure about compatibility with that LSI RAID card series. Guess we have to wait SM's answer regarding it.
  6. Thanks for clarifying about multipath and upgrade chances, Steve. The LSI MegaRAID SAS 9285-8e is the LSI 2208 chipset, right? What do you think? What are the chances for it to work? My main doubts now are with chassis, backplanes/expander connections options and similar. That's why the confusions on above questions. But I'll post some specific questions once I study it a bit more. I need to ready more online manuals.
  7. Very instructive Steve! We can find this UPS at the local market - APC SMX3000RMLV2U. A modular model is also available, specifically this one: SUM3000RMXL2U - However, it does not seem to be of more worth than the other (SMX3000RMLV2U). PDF brief and specs. I was still thinking about that issue you had with that SM chassis. Do you think that chassis could work with that LSI we've been talking about? But with the external ports version (I think it is the MegaRAID SAS 9285-8e) This SuperMicro (SC837E26-RJBOD1) chassis provides the possibility for 45 HDDs - It seems to be very similar to that one you have tried there. It has 2 backplanes in each chassis: One at its front and another at its back. The 847EL2 backplanes version have dual-port expanders that access all the hard drives. These dual-port expanders support cascading, failover, and multipath; as described in the product manual (PG 49... - C3). With regard to failover the manual says: "If the expander or data path in the primary ports fails, the system automatically switches to the secondary ports. This maintains a full connection to all drives". But... Image for reference: http://postimage.org/image/22dbwpyec/ What is multipath in this context and what is its benefit? As each chassis has 2 backplanes, does it mean we should need 2 ports of the RAID card (E.g. One for each BP) to connect to it? Or... Should we plug the port 8/11 (see image) at the rear/back backplane? How does it work? Also, what could we do with the ports 9 and 12? What is it for since we've probably used 7,8 and 10,11?
  8. I'll update this post with a list of high density chassis, if I can find a few more. 60 Drives - 4U DataON DNS-1660 Nexsan E60X
  9. Good to know it Steve! I've been reading some articles about UPS. This at the Wikipedia is a good start for those who also need it. First, I thought that an on-line UPS would be better due to what I described before and also because as the inverter running continuously, it could provide much more safety with regard to granting that the hardware would 'never' be turned off, where an off-line solution needs to take action in the meanwhile we have a power outage - You know? No power transfer switches are necessary with an on-line UPS. If an off-line solution can do the job perfectly, there may be no reason for more costs/investments. Where I live, the power lines are all 127V - 60 Hertz. There are options for 220V, with a little change or transformers - Not an option right now. I'll look again at the UPS and PDU you linked. Probably a non rackmount UPS as it may save some space in the future and less heat in the rack, and a zero U PDU. So, an off-line UPS can do the job (mostly) at no problem considering what I told? Is there any reason for a rackmount UPS I must be missing? Thanks for explaining about the integrated expander backplane. I'll study it a bit more. A reason why I were concerned of two chassis was due to the fact I didn't understand how 'stuff' work. I thought we would need a motherboard and all the hardware in all enclosures - But a single raid card. Did you understand what I mean? 3 enclosures = 1 RAID card, 3MB, 3+CPU, 3#memories, 3 or more everything. Now, if I understand it better, we'd need only a 1U or 2U server (head), and 1 or 2 enclosures; then we could use a SAS expander on each and nothing more. Something I searched a LOT and could NOT find, is a high density enclosure like this (link). I found SuperMicro with similar solution, as you mentioned. There is this AICipc XJ-SA24-448R-B, which does not sound a good idea due to design (you remove 2 HDDs at once, and I'm not sure if it's 6Gb/s). Here is a great model for 60 drives Nexsan E60X, and here it is its datasheet - Price? $45K to $60K. Isn't there any manufacturer of these high density enclosures you know? Some SAS6G enclosure just for disks - No server (head). No problem if there's a MB tray, anyway... Also, is there any reason it is so hard to find? Temperatures, vibration, or something that could be bad with these high density chassis? Do you advise these kinds of enclosures? By the way, this is a nice document about space organization within high density racks.
  10. I could not find that UPS you mention when I were looking after one. The one from your link is 2700 Watts, that other is 2100 Watts; that's good and it costs much less. Another difference is that the SUA3000RM2U is not an on-line UPS. Sometimes, the power environment here is a bit noisy, and not that 'stable' when there are many equipments on. As it's a home office, there are a few utilities in 'concurrent' use during a typical day, like showers, microwave, freezers, air conditioning, etc - I haven't had any outage due to many equipments using the power, but I can see some power stabilizer taking action very frequently when many things are in use. That's the primary cause of choosing an on-line UPS. As we have never used an UPS, what do you think? For the PDU, I first selected that one you linked. I was not sure about it due to the "Total Current Draw Output", "Input Current" and "Load Capacity". I also think that 2 is frequently better than one - Even so, I thought about buying the AP7802 or 2x AP7801 due to the their ability to handle 'major loads'. I've been doing some calcs and all the hardware may consume from 800 to ~1.750 Watts. However, if two Zero U AP9567 can handle all the loads at no problem, it'd be much better. Should I repeat the above/last question? Steve, what I liked about that Chenbro expander is that it does not require any PCI-x slot, if I'm not wrong - It can be powered by 1x 4Pin PATA. With regard to your question, I'm not sure if I can understand it; what kind of stuff are that you're mentioning? I haven't seen an integrated expander backplane in the chassis I took a look.
  11. The more I study Hardware vs. Software RAID 'pros and cons', the more I'd be happy to manage 24/48 drives individually and forget all the performance sakes... All kidding apart, this Chenbro CK23601 (CK23601H0C01) SAS Expander looks a bit more promising than the HP SAS Expander whether looking into cards without built-in expanders. Wondering what are the chances of incompatibility with the LSI's and Areca's cards.
  12. APC SMART-UPS RT 3000VA 120V; 2100 Watts / 3000 VA (SURTA3000XL) Rack PDU, Metered, 1U, 20A, 120V, 8x NEMA 5-20R (AP7801) As this this UPS is capable of up to 2100 Watts, it can generate a current of up to 17,5 amperes (2100W / 120V = 17,5A). If we buy a single PDU, to handle all these equipment, the PDU should to be capable of handling this 17.5A current, or we'll have a bottle neck, right? Here is the APC AP7801 PDU specification: Input Nominal Input Voltage: 100V, 120V Input Frequency: 50/60 Hz Regulatory Derated Input Current (North America): 16A Maximum Input Current per phase: 20A Load Capacity: 1920 VA Output Nominal Output Voltage: 120V Maximum Total Current Draw per Phase: 16A Overload Protection: No Now, a bit of confusion... The UPS has an output power capacity of 2100 Watts, 3000 VA, and 17,5A (if the formula is correct). The PDU has an input power capacity of 20A per phase and 1920 VA. Also, it has an output capacity of 16A. Following these numbers, it seems that the PDU can handle the 'amperes load' generated by the UPS, but it cannot handle the 3000 VA load, but only 1920 VA of input. Moreover, I'm not sure how much/many VAs or Watts the PDU can deliver, but we know it can 'deliver' 16A. That's the only number I have, and can't figure out the others. Is this PDU a capable hardware at all? I mean, to deliver what the UPS has to offer. Do you that other numbers for the PDU output? I mean, VA and Watts. How to figure it out? If that PDU is actually a bottle neck, there is another option: APC 2U, 30A, 120V, 16x NEMA 5-20R (AP7802) Input Nominal Input Voltage: 100V, 120V Input Frequency: 50/60 Hz Regulatory Derated Input Current (North America): 24A Maximum Input Current per phase: 30A Load Capacity: 2880 VA Output Nominal Output Voltage: 120V Maximum Total Current Draw per Phase: 24A Overload Protection: Yes This second one is able to 'receive' almost the 3000 VA from the UPS; 2880 VA. It also has an overload protection layer. Just to remember, the UPS has it. Will this one be our choice (AP7802)? Or would 2x AP7801 be much worthier than this seccond option? As some side notes, For Zero U options there is only a single PDU AP7831 due to the size of the rack (24U). Also, it is a "Maximum Input/Line Current per phase" of 15A and 1440 VA of "Load Capacity". For the UPS, there is also a rack version of that one; but we won't use 3U of the rack for the UPS. It can live beside the rack. It also means less heat inside it.
  13. I'm just remembering the FireWire2's post: Yes, it got and he helped a lot! I'm learning a lot with you too! Even if we study alone, research all the things, there are always something we can't fully understand - Even if it's some basics; as you may know, we are unsure what to look for, and there may not be an on-line answer that will answer your specific question. Sharing, that's all about sharing. I'm 26 today and I'm now remembering the internet in the 90's - That's very nice these opportunities, and that's what we've been working to do: to distribute some more opportunities like in the essence, you 'guys' are doing right now. Many thanks for your time, efforts and yes, patience A couple guys and a pick-up truck? Yeah, this is one of the reasons we're going to choose a 24U. :-) Nice tips regarding to the arrangement of equipments. I'm now wondering what kind of UPS is going to be enought for us. Server, ~48 drives and a few upgrades if and when needed, network stuff, etc. APC equipment is easy to find here... Care to clear it up?
  14. Thanks for the tips Steve. And I haven't thought of buying something from a datacenter! There are a large telecom company and a datacenter 50 miles from here, there are 2 small ones right here where I live. As I have never played with racks, "major" servers, and such sort of equipments, I thought of paying them a visit just to learn a bit more, but I didn't think about buying an equipment from them - So, I'll call them and ask if I can have access to their facilities and also call that telecom and DC - Maybe they can do something for us. What I'm sure is if these kind of companies works with minor racks such the 24U APC I've told you. A major rack would be overkilling for us, would not help at this point - Anyhow contacting and visiting them will be constructive; a must do. Have you got the opportunity to see or manage that APC rack? (link again) Regarding to it's dimentions, here it is: Maximum Height: 1198.00 mm Maximum Width: 600.00 mm Maximum Depth: 1070.00 mm I liked it, but as I'm not able to fully understand these subjects, I'm not sure if it can "take care" of all the needs. What do you think about it?
  15. Absolutely, that rack would not be an option for us... ~$5K + 60% taxes + ~$2K to ship = ~$10K For the rack, we're thinking about buying the APC AR3104 24U (NetShelter) from a local dealer. We'll need a 24U rack. For this one we'll pay around $ 1.700. Is there something special we should to pay attention when choosing a rack? With regard to this one, is there something we could include (addon/accessory/etc) that could be useful? ... Nice formula, though. I'm sure I'll use it. Did you wish to know that a month ago? lol, but that's sad; I know. Why that card didn't work with the SM. SC837E16? Did you discover the cause? By the way, I'm wondering how cool the HDDs would run on that kind of case. It was my first thought when I saw it. Yes, there must a plan B, which will cause some more expenses but can save us some time and money. That's nice a 200to300Tb system at home, which I can't imagine or afford here. You can buy a brand new car by selling this "little thing". Would you? I doubt! :-)