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Recent content by cepa

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    PCI-E to 4 Sata (I know often asked...)

    Hi wladyslaw, I assume that youre from Poland, take a look at this one: http://www.morele.net/kontroler-digitus-pci-e-do-esata-ii-sata-ii-4-portowy-ds-30104-359821/ its based on Marvell 88SX7042 chipset, i have two of them and performs very well in zfs raid-z and stripe-mirror
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    SSD to slow for ZFS ZIL

    Hello, currently I have two ZFS (zpool v28) builds based on FreeNAS 8.3, both have ZIL and L2ARC on separate SSD on separate SATA channels. In both machines I put Intel 320 40GB SSD that is dedicated for datacenter use and have a super capacitor. Everything works stable however Intel 320 SSD...
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    Intel server board S3420GPV and Hynix RDIMM problem

    Hello, i just have bought four HMT151R7BFR4C-H9 (4GB DDR3 10600 ECC REG) and after mounting them in slots the system is not booting. Status LED displays 0xE8 message which is "No Usable Memory". According to intel spec that server board supports both UDIMM and RDIMM, and I have Intel Xeon...
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    Thinking about putting an SSD in a Thinkpad T530

    I have replaced original WD Black drive by OCZ Vertex3 SSD in my thinkpad T420, and after a year of usage i think i will never come back to spindles again ;) I dont know about T530, but in older T420 you can put at most three drives, one in a "standard" place where your current drive is placed...
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    [zfs] vfs.zfs.cache_flush_disable and data integrity

    ok, false alarm, it seems that messing with NFS settings when another system is connected is a bad idea, problems gone after reboot ;) btw, I have heard that having cache_flush_disabled turned on is a risky idea, does anyone have any expierience with this setting in production?
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    SSD or not?

    I can't agree with OCZ bad reputation, got one vertex3 120gb in my laptop working for almost a year by now, no problems at all, only the performance seems to be a bit lower than it it was at the begining. I also have two vertex3 60gb in two workstations working 24/7 and also no problems at all...
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    [zfs] vfs.zfs.cache_flush_disable and data integrity

    Hello, today I started to play with turning off cashe flush (vfs.zfs.cache_flush_disable=1) on my freenas box. I was quite dissapointed with the performance of six drives in stripe-mirror exported to a NFS share without separate zil. Currently the cache_flush_disable option is turned on and...
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    ZFS Backup

    Thanks for replies, zfs snapshots seems to be a simple solution however I'm wondering if making a snapshot of a running virtual machine from "outside" is a good idea, afterall its not just data on disk but also its current state. I'm thinking of using xenserver builtin snapshots but the...
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    ZFS Backup

    So here is the problem: There is a server with two ZFS pools inside: - tank0 - stripe-mirror + ssd zil + ssd l2arc - ~1.5TB of capacity - tank1 - raid-z - ~6TB of capacity tank0 is being used as a XenServer storage over NFS, and tank1 is dedicated for a backup How to implement...
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    [zfs] Does sata drive iops matter?

    I assume that having L2ARC on SSD will cache most often read areas of the storage so this will rise overall performance significantly. However in regards to writes I thought that ZIL will be used as a "queue" for data before it gets to the spindle drive, and when it does all the writes will be...
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    [zfs] Does sata drive iops matter?

    thanks for the replies Regarding DDR3 setup, I already have a spare server mobo so at the beggining Ill see how it goes and then if neccessary I will upgrade it. Regarding SSD RAID 10. As I wrote, 1TB of usable capacity is a minimum. To have 1TB on SSD I would need at least five SSD drives...
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    [zfs] Does sata drive iops matter?

    Hello this is my first post on this forum, and need some advice on ZFS topic :) I'm going to build a new storage server for my development lab, it will be directly connected to separate machine with XenServer via NFS on single 1gbit nic. There is +20 virtual machines running 24/7. Most of the...
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