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Found 37 results

  1. Hi, I recently bought an Alienware area51 desktop (or is it Aurora?) from the Dell outlet. It had all I wanted from it except it is lacking in the HDD department with a single Seagate 1 TB 7200 RPM disk. I figured it would be easy to upgrade to 4 3 TB Seagates which I also bought but haven't installed yet. I'm a bit short of time and would like to install them the fastest and easiest way possible. I tried putting in one of the 3 tb disks and changing in the bios boot screen the hard drive mode to rAID but the computer won't boot. My idea was mirroring that one and then removing the 1 tv and setting in another of the 3 gb drives to make the first 3 gb drive 3 gb again, and then finally the other two. I just would really like to skip making a backup of the boot drive and just copying it over... Any tips? Something I can download or buy (cheap) to do this? Thanks, Xair
  2. LSI MegaRaid - Image Drive from Failed RAID I had a power failure and my LSI MegaRaid 3 disk SAS RAID 0 failed. My attempts to recover the RAID have also failed. I plan to rebuild the array and go with RAID 5 and add another SAS disk. However, before I wipe the drives I would like to image each of them separately. I tried to boot up using a Linux live boot CD. I can boot up but I can't see my drives. I tried just one drive plugged in and booting but the drive can't be seen so I can't call the imaging command. I'm assuming since the MegaRaid SAS controller says that the virtual drive is bad, then it will never mount. I tried to find a SAS to USB cable online so I could just plug in each drive and image them but I can't find such a product. I thought maybe I could use the MegaRaid controller with one drive plugged in and set it as a new Raid 0 so I could get it to mount. However, it seems to want to call the initialize command and want to wipe the drive. Losing the Raid tables for the original Raid wouldn't be a problem, but I don't want the data to be erased. Any suggestions on how I could image each drive? Thanks.
  3. Hi all, This is my first post in this forum, I hope someone can lend me a hand since now I have get out of ideas. I've built a raid 5 on a Asrock z87 extreme6 using six Western Digital RED 4tb that are connected to the six intel controller SATA3 ports, with the aim of creating a 20Tb Raid 5. The OS is Windows 8.1 x64. I created the raid from the BIOS utility selecting 64kb size (I had option of selecting 64 and 128 but the utility reccomended 64kb in case of raid 5). Once in Windows I formatted the raid unit with a 20Gb partition and write speed was really slow (10 MB/s max), even after waiting raid to be completely constructed (it took several hours) After reading and looking for information I enabled write cache and disabled write-cache buffer flushing. I also set simultaneous on in the Intel Rapid Storage Technology panel. After doing this the write speed increased to 25-30 MB/s. I have notice that physical cluster size is 4098 bytes (usual on those 4tb disks), but logical cluster size is 512 bytes: Shouldn't those cluster sizes match to have a good performance? In this case, how to change it? I've try to delete partition and create again, but selecting different cluster sizes for que partition, and the best performance is using 64kb (the stripes size), but it's only 50-60 MB/s actual speed copying a big MKV file from an SSD, and even doing it if doesn't makes any change on the capture where we see the 512 bytes for logical sector size. AS SSD Benchmark seems to tell that partition is correctly aligned: The results of the speed here seems ok, but as I told, real speed never exceeds 58-59 mb/s in writes. I attack a capture of fdisk, I really don't know if it's ok or bad aligned: ATTO DISK Benchmark: Those 6 discs were installed on a NAS, having a write speed higher than 80 mb/s, where is the problem here? Many thanks in advance
  4. I need a two port SATA RAID controller for a pair of SSDs with only one requirement: mirror two OS & applications containing SSDs or HDDs and not crash the OS when one fails. Reliability and price are the main considerations. Hot-swapping is not a requirement (overkill), neither is speed an issue because system is already more than adequate to the task. Thanks.
  5. fbsd

    Mirror RAID

    Hello, My board was Gigabyte EP45-DS3R with Intel ® ICH10R. There is two disc in raid 1 mirror configuration Array_0000. Before two weeks i had problem with windows boot . I was disconnected second disc and installed fresh Windows installation on first disc. I need to back second disk in system and sync data. What is the proper way to do that?
  6. Can someone please confirm what it means to "initialize" a virtual drive on an LSI MegaRAID card? I've read in some places that it's writing zeroes to all the drives (Fast Init only does it to the first/last 10 MB, Slow and Background Init do the entire drive space). Assuming I'm correct, if I'm setting up a RAID 1 or RAID 10 with SSDs that I've just secure erased, wouldn't writing zeroes to the drives (A) be total overkill since the drives are already consistent and ( severely impact performance until GC has time to clean things up? I've also heard that performance may be degraded if the RAID card isn't sure the drives are consistent. Is this true? If so, would running a consistency check shortly after setting up the virtual drive solve that? Many thanks in advance!
  7. Hi. I have an Areca 1880IX-12 with a raid-6 set, containing 8x2TB. The 1880-card malfunctioned (the internal expander died), and I received a new card from Areca. The new card shows two of the devices as "Missing" from the raid set, and the same disks are labeled "Free" in the device list. I have not done anything yet, other than let the system boot. There are also two disks in a raid-1 set (OS), and this raid set is acting fine. Because this is raid-6, missing 2 out of 8 disks should not be a disaster, and my first thought was to add the two missing devices as hot-spares to the raid set, and then let the raid set rebuild itself. But to be sure to do this in the right order, I have searched and read a lot of different posts about the topic, but none of them seems to be exactly like my situation. I therefore thought that it's better to be safe than sorry, and ask here if someone can guide me back to a healthy raid set. What are the correct commands, and in what order? Additional info in screencaps. If more information is needed, please don't hesitate to ask. =)
  8. Hi I have 3, 3TB WD Red drives on a LSI 9260CV in raid 5. Read = always read ahead IO Policy = Cached IO Write = Always write back OS= Win 2012R2 latest, firmware Drivers lastest I did some benchmarks and I can only explain the sequential results. The rest I dont get it, Raid5 is supposed to have slower writes due to parity calculation. The LSI card has 512K cache and for sure it influenses the results: the numbers get smaller as the ratio cahe/file size changes. While this is normal, there is always 50% more throughtput for random writes and this is consistent whatever the file size. I would expect that ratio to drop also as the test file grows bigger (if the cache was the reason for this strange performance). Here are results for a tiny file that fits entirely into the boards cache, so numbers reflect PCI transfer not disk perfomance. What did I miss ? m a r c
  9. 1)Which RAID is best suitable for below specifications for Complex IO systems? **For a 10 TB disk **protection against single drive failure **speed is not required **Low cost is desired. ** minimum wasted space and also please let me know how to find model number, quantity, RPM speed, seek time and cost for the drive mentioned above. 2))Which RAID is best suitable for below specifications for Complex IOsystems? **for a 2 TB disk ** best speed ** NO Redundancy ** minimum wasted space If not RAID where SSD is used?
  10. Hello, I need to build a powerful Graphics-Workstation (Windows7-64 prof.) for Video editing. WS shall be equipped with one professional graphics controller (PCIe 16x) and 2x LSI MegaRAID-9270-8i controllers (both at PCIe 8x) reuslting in two RAID5-Arrays consisting of 8 drives each. The workload is as follows: Large files 2-6GB+ (sometimes several) are read from any of the 2 LSI MeagRAIDs while (often at the same time) Video-sequences are cut, pasted, rendered etc.. No other PCIe slots will be used. I find it hard to find a suitable motherboard that supports PCIe Version 3 without bandwidth limitation on any of the PCIe-lanes or slots. Which Motherboard(s) would conform to (or best meet) the setup described? Chipset Z87 supports PCIe Ver 3, but most boards I've seen multiplex the lanes with a PEX8747 chip. AFAIK Chipset X79 supports PCIe Ver 2. However, I would think the primary bottleneck might be the disk-write-speed (despite an 8-drive RAID5-array). Therefore a MoBo with PCIe Ver 2 would probably do the job as well. But which one? Any other thoughts or suggestions? Your advice is highly appreciated. Thanks
  11. My RAID5 Array seems to be broken by possibly a bad windows shutdown a couple weeks ago. I can no longer see the drive in Windows. Ok so my first question is a) Given that each drive(3) is healthy and working, can I clone each drive with Ghost and use the cloned drives as my test dummies to troubleshoot my issue? Does anyone have any advice for the complete story below? I have 3 2TB in a RAID5 setup. One day the PC just shut off but then booting back into windows 8, it would never come up. I removed all power cables from the RAID drives. Windows 8 comes up right away. Figure I would come back to it in a couple weeks(me being in denial not wanting to deal with it). Now I have to deal with it. In the Silicon 3114 RAID controller BIOS, it shows the L001 drive as an Invalid drive. The M001 drives are reserved (image). Windows shows nothing. I plug them into the motherboard via non-raid setup and all drives come up but one comes up as 4TB RAW with a drive letter (image). When I put a replacement drive in, it does not rebuild the RAID5. See images. BIOS image Sil3114 SATARAID5 Manager image This program shows the new drive is set for pass-through (bypass raid). I do not know how to fix this. But the only option in the program I can do is "Create RAID Group" which I don't want to do. So I hook everything back to the way it was, correct channel, cable, drive, etc. SATARAID5 shows this group in a legacy RG0? (image). I get no option to Rebuild, it's grayed out, same with the spare. Does anyone know what this means? I have important photography on here I can't risk to lose so before I bring this to a DR I want to see if there is anything I can do. The data is there as I tried to do a file recovery when HDD's were connected straight to windows. Thumbnails look fine but the image is corrupted when looking at them. Has anyone experience a drive saying Invalid RAID drive on the Silicon 3114? Can I choose convert legacy? If I go into Device Summary it shows all drives as Healthy. I'm a network guy so RAID is my weak spot. Here is a link to the SATARAID5 manual http://www.siliconimage.com/docs/SATARAID5-UserGuide_v1... In order for me to use this utility in Windows 8 I had to install the latest version of Java, then run command as an administrator and execute the java file from there. My UAC is already off which I couldn't figure out why it wasn't opening.
  12. Hello everyone, I've been making myself crazy trying to figure this out and haven't had any luck so far. I acquired a bunch of oldish parts that I'm trying to cobble into a workable file server. Tyan S2927 (http://www.tyan.com/Motherboards_S2927-E_S2927G2NR-E) Adaptec 5805Z (http://www.adaptec.com/en-us/support/raid/sas_raid/sas-5805z/) The machine has been up and running for a while now without issue. However when I add the RAID controller to the mix I never get the option to enter the array configuration menu. I'm not sure if there are any BIOS settings that are pertinent to getting this working but I feel like I've flipped about every switch at this point. The card definitely powers up and the cache protection mechanism is active (amber light on the card). Things I have tried thus far: Updated motherboard BIOS to latest version Tried reseating the card in both slots Tried both PCI-e slots Tried loading in without the Mini-SAS connector plugged into the card Moved RAID controller to another computer for testing. Can't access array configuration there either, although that machine does have an AMD fake-RAID setup that could possibly be interfering(?) I can't reconfigure that machine to find out at the moment. I don't know for sure that the card is still operational. Supposedly it was when it was pulled and given to me but who knows right? Is there anything else I'm missing here? Thanks in advance!