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Disk Inventory

Modified 18:23, 15 Feb 2014 by hartrao | Page History

    Version as of 23:25, 22 Jul 2024

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    The EVN directors have agreed that each of the “busy” EVN station should provide at least 150 TB to the EVN disk pool. The other stations should contribute about 2 times the amount of disk space which is recorded at their telescope per session.

    In 2011 the EVN directors agreed that each station should buy 7000€ worth of disk modules per year.

    Inventory

    Please update the table below

    Station Total TB 1 TB 1.3 TB 1.4 TB 1.6 TB 2 TB 2.4 TB 3.2 TB 4 TB 6 TB 8 TB 12 TB 16 TB 24 TB 32 TB PACKS Last Updated
    Effelsberg 1362 25 0 21 9 11 0 26 37 141 12 9 47     211 2014-01-21
    Westerbork 216 0 2 20 0 36 0 0 12 0 8 0 0     78 2013-07-17
    Onsala 254 2 21 0 0 30 0 0 21 0   0 5     79 2013-11-08
    Medicina 264 2 0 0 0 22 5 13 11 0 3 0 6     62 2014-02-13
    Noto 278 10 0 0 0 14 0 20 0 0 6 0 8     58 2013-11-12
    Jodrell 478.8 0 0 0 4 14 0 17 0 13 29 0 5     82 2013-12-16
    Seshan 110 0 2 0 2 10 0 0 13 0 4 0 0     31 2012-12-10
    Urumqi 150 0 0 24 0 10 0 0 8 8 2 0 0     52 2013-11-10
    Hartrao 208 0 19 0 0 0 0 10 2 0 10 0 4     45 2014-02-14
    Torun 193 0 0 0 2 27 0 0 8 0 132 0 0     50 2013-09-03
    Yebes 157 0 0 0 3 2 0 0 15 0 11 0 0     31 2012-05-04
    Arecibo 20 0 0 0 0 10 0 0 0 0 0 0 0     10 ?
    Metsähovi 78 0 0 0 0 2 4 2 3 1 3 0 1     15 2013-10-02
    KVAZAR 160 0 0 0 0 0 0 0 0 0 20 0 0     20 2012-07-24
    JIVE 206 5 0 10 0 53 0 0 0 0 10 0 0     78 2012-08-21
    Total ~3886
    EVN use ~1850

    1) 10 Modules with 4 disks a 1.5 TB

    2) 5 modules are 4-packs with 2-TB disks.

    Note:

    • Effelsberg: Will remove all our small modules with less than 2 TB. (April 2010)
    • Effelsberg: Will try to avoid sending modules smaller than 3.2 TB. (January 2011)
    • 2 TB disks can only be handled with SDK8.2 and SDK8.3 with patch applied.
    • Modules bigger than 8 TB require SDK 9 which is now officially supported by the field operation.

    Disk purchases

    The directors agreed in 2011 that each station should buy disk-modules for 7000 € per year.

    Year Effelsberg Medicina Westerbork Jodrell Yebes Torun Onsala Noto KVAZAR Shanghai Urumqi Hart
    2011 32 TB     48 TB 24 TB       48 TB     80 TB
    2012 64 TB 32 TB  32 TB 80 TB     80 TB 64 TB 112 TB      
    2013 80 TB 48TB 32 TB 120 TB   40 TB 80 TB 64 TB     96 TB  
    2014   32TB                    

    Disks which seem to work well

    2 TB

    • Hitachi Ultrastar A7K3000 HUA723020ALA640 2 TB Internal Hard Drive - Walter A.
    • We bought 60 Western Digital 2TB WD20EFRX-68EUZN0 for 83Euros+VAT each one. Disks are cheap and perform well. Only one nasty issue: the internal idle3 timer must be disabled on each one, to avoid delay at record start. Giuseppe (Medicina, Italy)

    3 & 4TB

    I heard rumors from Haystack that disks from Hitachi and Seagate seem to work well. Durability is still untested. Hopefully we can have more details by end of January 2014 (TOG meeting). - Walter A.

    Today 14.1.2014 we ordered HGST HUA723030ALA640 3 TB (Hitachi SATA 600, Ultrastar A7K3000) for 2 modules for test purposes. We have them working in RAIDS here without problems. Cost 165€ + VAT - Walter A.


     

    ASTRO / GEO VSN assignments at EVN stations

    The information below may be out of date. Please update!!

    • HART-001 thru HART-020 are geo modules
    • HART-021 thru HART-052 are astro modules
    • HART+100 up to +499 will be geo modules
    • HART+500 and above will be astro modules
    • Medicina, label number above 1000 are geo modules, below are astro module (ie med-1001 stands for geo modules).
    • Noto: Geo/Astro split unknown
    • Onsala: Astro disks have a VSN number below 100, so it will look something like this: OSOD-001
    • Onsala Geo disks have a VSN number above 100, so it will look something like this: OSOD-101
       
    • Yebes astrodisks have a VSN number below 100: OAN-00xx (PATA) and OAN+00xx (SATA, up to OAN+0025)
    • Yebes geodesy disks have a VSN number above 100: OAN-01xx
    • SHAO: Geo/Astro split unknown
    • XAO (Ur): XAO#1xxx for Astro, XAO#0xxx for Geo and XAO#Txxx for local Testing (IDE: #=- , SATA: #=+)
    • KVAZAR: Geo/Astro disks used for EVN have a VSN format: IAAE-xxx.