Translate the text from Welsh to English.



 
Fore 24 Ionawr, cafwyd mater technegol a achosodd ddiffyg yn y ddwy ganolfan ddata sy'n cael eu gweithredu gan Wasanaeth Gwybodeg GIG Cymru (NWIS) ar ran Gwasanaeth Iechyd Gwladol (GIG) Cymru.   
  
Effeithiodd y digwyddiad ar ddau ddeg chwech o systemau sy'n cael eu lletya'n genedlaethol sy'n rheoli apwyntiadau i gleifion ac sy'n rhannu atgyfeiriadau cleifion, canlyniadau profion, canlyniadau labordai a cheisiadau gan feddygon teulu am brofion. Cafodd system e\-bost GIG Cymru ei heffeithio hefyd.   
  
Yn ystod y digwyddiad, cafodd cynlluniau parhad busnes eu rhoi ar waith gan bob Bwrdd Iechyd i sicrhau bod staff a chleifion GIG Cymru yn cael eu cefnogi yn ystod y diffyg gwasanaeth hwn ac, o ganlyniad, roedd modd parhau i roi gofal a thriniaeth. Fodd bynnag, gan fod y digwyddiad hwn wedi effeithio ar ein staff rheng flaen, wynebodd cleifion oedi, er enghraifft o safbwynt derbyn canlyniadau profion.   
  
Erbyn 16:15 ar yr un diwrnod roedd pob system yn weithredol, ac roedd popeth yn gweithio fel arfer erbyn 20:00\.  
  
Hoffwn ddiolch i'n holl staff technegol yn GIG Cymru a weithiodd mor ddiwyd i ddatrys y mater hwn cyn gynted â phosibl. Hoffwn ddiolch hefyd i'n holl staff rheng flaen a barhaodd i gynnig gwasanaethau rhagorol i bobl Cymru mewn amgylchiadau anodd.  
  
Ar ôl i'r mater gael ei ddatrys, cafodd ymchwiliad ei ddechrau gan NWIS i ddarganfod beth oedd achos y diffyg yn y canolfannau data a chytunais y byddwn yn cyhoeddi datganiad ysgrifenedig pan fyddai'r adolygiad hwnnw wedi dirwyn i ben.   
  
Yn gyntaf, gallaf gadarnhau nad ymosodiad seiber oedd hwn ac nad oedd unrhyw berygl i gadernid cofnodion cleifion o ganlyniad i'r digwyddiad hwn.  
  
Gallaf gadarnhau hefyd fod yr ymchwiliad wedi dod i'r casgliad mai problem gyda'r offer waliau tân oedd achos y digwyddiad. Cododd y broblem pan gafodd newid rheolaidd i wneud i wal dân. Mae gweithgynhyrchwr yr offer wedi cadarnhau bod y wal dân wedi ymddwyn mewn modd na ellid fod wedi'i ragweld ac na ddylai'r newid fod wedi cael effaith mor andwyol.  
  
Daeth y gweithgynhyrchwr o hyd i newidiadau i gyfluniad y waliau tân er mwyn osgoi amgylchiadau tebyg eto a chafodd y newidiadau hynny eu cymhwyso'n llwyddiannus i'r offer wal dân am 7\.30 ddydd Mercher 31 Ionawr. Mae newidiadau eraill wedi cael eu gwneud hefyd er mwyn monitro gweithgarwch waliau tân yn well.  
  
Er bod methiant TG o'r math hwn yn anghyffredin yn GIG Cymru, mae fy swyddogion yn gweithio gyda Byrddau Iechyd a NWIS i ddatblygu ffordd newydd o gyfathrebu am ymosodiadau seiber a digwyddiadau TG, er mwyn  tynnu sylw rhanddeiliaid at ddigwyddiadau yn y dyfodol a rhannu’r wybodaeth ddiweddaraf â hwy.  
  
Caiff y datganiad ei gyhoeddi yn ystod y toriad er mwyn rhoi'r wybodaeth ddiweddaraf i aelodau. Os bydd aelodau eisiau i mi wneud datganiad pellach neu ateb cwestiynau ynglŷn â hyn pan fydd y Cynulliad yn dychwelyd, byddwn yn hapus i wneud hynny.  








Translation:


 
On the morning of the 24 January a technical issue occurred, which caused an outage at the two data centres operated by the NHS Wales Informatics Service (NWIS) on behalf of NHS Wales.  

  

This incident affected twenty\-six nationally\-hosted systems, including systems which manage appointments and which share patient referrals, tests results, laboratory results and GP test requests. The NHS Wales email system was also impacted.  

  

During the incident, all Health Boards activated business continuity plans to ensure both NHS Wales staff and patients were supported during this outage and as a result, care and treatment continued to be provided. However, as this incident impacted our frontline staff, there were delays experienced by patients, for example in receiving test results.  

  

By 16:15 the same day all systems were operational, with business\-as\-usual service being resumed by 20:00\.  

  

I would like to thank all of our NHS Wales technical staff who worked hard to resolve this issue as quickly as possible. I would also like to thank all of our frontline staff who continued to provide excellent services to the people of Wales under difficult circumstances.  

  

Following resolution of the issue, NWIS initiated an investigation to establish the cause of the data centre outage and I agreed to issue a written statement once this review had concluded.  

  

Firstly, I can confirm this was not a cyber attack and that the integrity of patient records was not compromised by this incident.  

  

I can also confirm that the investigation found the cause of the incident to be a problem with the firewall equipment which occurred when a routine firewall change was applied. The manufacturer of the equipment has confirmed that the firewall acted in an unpredictable way and that the change made should not have had a detrimental effect.  

  

The manufacturer identified changes to the configuration of the firewalls to avoid a similar circumstance and these were applied successfully to the firewall equipment at 7\.30 on Wednesday 31 January. Further changes have also been made to provide greater monitoring of firewall activity.  

  

While this type of IT failure is unusual in NHS Wales, my officials are working with Health Boards and NWIS to develop a new cyber attack and IT incident communications, to alert and update stakeholders in the case of future incidents.  

  

This statement is being issued during recess in order to keep members informed. Should members wish me to make a further statement or to answer questions on this when the Assembly returns I would be happy to do so.