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Recent content by tsrtg

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    Toshiba X300

    According to the review on overclockers.ru, X300 is just another retail name for MD04ACAxxx series, while P300 is just another retail name for DT01ACAxxx series. The drives even still have the old model numbers (MD04/DT01) written on them. So they are exactly the same drives that were sold...
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    Alternative to Plextor optical drives supporting SATA

    Plextor drives were great because they could read scratched, damaged, badly burned discs which other drives could not. I still have PX-130A in the old PC and I turn it on when I cannot read a DVD or CD on my main PC. PX-130A can read virtually anything. Not all Plextors sold were real...
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    OpenIndiana replacement

    I wonder why you don't mention sequential resilver as a factor. Considering that traditional resilver takes ages and there is a risk of losing additional drives in the process of resilvering because of extra stress, isn't sequential resilver an important feature for making the array safer?
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    ZFS - checksum data in RAM:

    Checksum matching to corrupted data means there is a hash collision. Since ZFS uses SHA256 hash, we need to calculate 340,282,366,920,938,463,463,374,607,431,768,211,456 (2^128) hashes before probability of matching it to corrupted data reaches 50%. "Not very likely" is an understatement.
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    ZFS - checksum data in RAM:

    The linked article specifically debunks this claim. If the checksum fails on read, ZFS doesn't overwrite anything with the corrupted data. It reconstructs the block from parity and if the checksum matches after that, it overwrites the block but then we don't have any corruption. If the checksum...
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    Are there any good 2tb+ drives out there without the high failure rates?

    PH3400U-1I72 is MD04ACA400 drive packaged for US retail. It is a 5-platter drive made in Philippines. I don't know why Toshiba relabels their drives using those PH... numbers for US retail, making it difficult to identify the drive. The real model number is mentioned, for example, in Amazon...
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    Are there any good 2tb+ drives out there without the high failure rates?

    There are two different kinds of 3TB Toshiba drives. The first one has OEM model number starting with D..., e.g. DT01ACA300. These drives use 3-platter design bought from HGST, and are manufactured on ex-HGST Chinese factory. The second one has OEM model number starting with M..., e.g...
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    ZFS drives, what's the current choice?

    Authentic HGSTs have very good reputation too. I now have 19 of them, the oldest ones have 1570 power-on days count according to SMART, not a single problem so far.
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    ZFS drives, what's the current choice?

    PH3300U/DT01ACA300 are not real Toshiba, they are former HGST made on the Chinese factory sold to Toshiba during the WD deal, and they seem to be less reliable than regular HGST drives. 5TB Toshibas are made on Toshiba's own factory in Philippines, so far there is no negative feedback on their...
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    HDDs power cycling without end

    Staggered startup is already on, but the disks do not enter this condition on startup, it happens at random time during normal operation (last time I had 72 days uptime before it happened, so I almost started to think that the problem disappeared by itself).
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    HDDs power cycling without end

    Since this thing happened again, it looks like Seasonic Platinum-860 is not able to handle 20x 7200RPM HDDs reliably. Can one recommend an ATX power supply which would not require server case and would be able to handle 20x 7200RPM hard disks? No more Seasonic please.
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    HDDs power cycling without end

    A couple of months ago I built the following all-in-one system: CPU: Intel Xeon E5-1650v3 3.5GHz (6-core Haswell-EP) Motherboard: Supermicro X10SRH-CLN4F (onboard LSI3008 SAS controller in IT mode) Additional SAS controller: IBM M1015 (IT mode) RAM: 8x16GB HMA42GR7MFR4N-TFTD (Total 128GB) Power...
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    Horrible disk performance under ESXi

    Horrible disk performance within guests is why I'm started measuring performance directly from the troubleshooting console to see if it's any better. It takes forever for a VM to even load. Here's the dd test from Solaris guest: root@solaris:~# time sh -c "dd if=/dev/zero of=test bs=1073741824...
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    Horrible disk performance under ESXi

    Hello, I've started building my first home server, hoping to have 3 VMs: pfSense, Solaris-based NAS and Win 7 x64. I have Supermicro X10SRH motherboard, Xeon 1650v3, 64GB RAM. ESXi 5.5u2 is installed on HGST 7K750EA (7200 RPM), which is connected to the on-board sSATA controller running in AHCI...
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    6TB Hard Drive Round-Up

    Ancient selection of drives. And no mention of any HGST drives even in the conclusion.
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