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Disk Inventory

Modified 13:52, 6 Jan 2015 by WalterAlef | Page History

    Version as of 21:34, 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 1458 25 0 21 9 11 0 26 37 141 12 9 47   3 214 2014-04-23
    Westerbork 248 0 2 20 0 36 0 0 12 0 123 0 0     82 2014-07-153
    Onsala 412 0 21 0 0 30 0 0 21 0   0 5   5 82 2014-10-31
    Medicina 328 2 0 0 0 22 5 13 11 0 3 0 10     66 2014-11-19
    Noto 278 10 0 0 0 14 0 20 0 0 6 0 8 3   61 2014-10-26
    Jodrell 558 0 0 0 4 14 0 17 0 13 29 0 10     87 2014-03-24
    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 248 0 19 0 0 0 0 10 2 0 15 0 4     50 2014-02-19
    Torun 193 0 0 0 2 27 0 0 8 0 132 0 0     50 2014-10-25
    Yebes 229 0 0 0 3 2 0 0 15 0 12 0 4     36 2014-12-01
    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 2     16 2014-10-13
    KVAZAR 160 0 0 0 0 0 0 0 0 0 20 0 0     20 2014-10-28
    JIVE 206 5 0 10 0 53 0 0 0 0 10 0 0     78 2012-08-21
    Total ~4322
    EVN use ~1922

    1) 10 Modules with 4 disks a 1.5 TB

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

    3) 12 modules are 4-packs with 2-TB disks. In Dec 2014 we bought 30 new 4TB disks. These diskpacks will be eventually converted to six 16 TB packs (8x2TB disks)  and initially six 16 TB (with 4x4TB disks, eventually to become 32 TB) packs. JIVE correlator staff will do the conversion once the diskpacks are released (six 4TB disks will be kept as spare at the JIVE correlator). 

    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 Metsähovi
    2011 32 TB     48 TB 24 TB       48 TB     80 TB 12 TB
    2012 64 TB 32 TB  32 TB 80 TB     80 TB 64 TB 112 TB     40TB  
    2013 80 TB 48TB 32 TB 120 TB   40 TB 80 TB 64 TB     96 TB 64TB 32 TB
    2014 96 TB 32TB 152 TB 16TB 72 TB   150TB 72 TB         16 TB

    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)
    • We bought 32 disks: Weestern Digital 2TB ED20EFRX for 80 euros + VAT each. Following Giuseppe's advice we ran idle3ctl on all of them to disable the timer.

    3 TB

    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.

    4 TB

    We bought HGST 4 TB Hitachi Ultrastar 7K4000 SATA III (HUS724040ALA640 0F14688) disks. The 3 modules we made conditioned well. Cost 211 € + VAT. - Walter A. 28.4.14

    In Nov 2014, ASTRON also bought  (30 pieces) Hitachi Ultrastar 7K4000 SATA III disks  for €200 (+21% VAT). Antonis Polatidis 9.12.14

    6 TB

    We bought HGST 6 TB Hitachi He filled disks (need them for high altitude). They will be used in modules for the Mark 6. Price about 360 € + VAT (bought 128). Soon more....   - Walter A. 1.10.2014

     

    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: "NOT" are geo modules (i.e. NOT-0001) - "NTO" are astro modules (i.e. NTO-0001)
    • 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.