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Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: =?UTF-8?Q?Arne_Vajh=C3=B8j?= <arne@vajhoej.dk> Newsgroups: comp.os.vms Subject: Re: RX2800 sporadic disk I/O slowdowns Date: Fri, 18 Oct 2024 21:12:30 -0400 Organization: A noiseless patient Spider Lines: 21 Message-ID: <vev11v$3h4as$3@dont-email.me> References: <veu99d$3derp$1@dont-email.me> <veumb8$3gbt8$1@dont-email.me> <veut7p$3hg8v$2@dont-email.me> <veuu3v$3h4as$1@dont-email.me> <veuusv$3hnnq$1@dont-email.me> <veuv45$3h4as$2@dont-email.me> <vev04j$3hnnq$9@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sat, 19 Oct 2024 03:12:31 +0200 (CEST) Injection-Info: dont-email.me; posting-host="81a80866a3999a8281ab16ac43ba7e05"; logging-data="3707228"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18iuSzDNizvJb6+Oyaz8C/TlU/17hw/dwc=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:2BBexTf3ZJ/GiRlslhefe0GszNc= Content-Language: en-US In-Reply-To: <vev04j$3hnnq$9@dont-email.me> On 10/18/2024 8:56 PM, Lawrence D'Oliveiro wrote: > On Fri, 18 Oct 2024 20:39:33 -0400, Arne Vajhøj wrote: >> On 10/18/2024 8:35 PM, Lawrence D'Oliveiro wrote: >>> On Fri, 18 Oct 2024 20:22:23 -0400, Arne Vajhøj wrote: >>>> On 10/18/2024 8:07 PM, Lawrence D'Oliveiro wrote: >>>>> Has VMS still not got any equivalent to mdraid? >>>> >>>> VMS got volume shadowing in 1986 I believe. >>> >>> Relevance being? >> >> It is OS provided software RAID. > > Does “volume shadowing” mean just RAID 1? I believe so. 0, 5, 6 and 10 requires a RAID controller. Arne