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identity=mailfrom; envelope-from="ak@triklod.rs"; helo=mx.triklod.rs; client-ip=185.119.89.11 Received: from mx.triklod.rs (mx.triklod.rs [185.119.89.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tb-mx0.topicbox.com (Postfix) with ESMTPS for <9fans@9fans.net>; Fri, 1 Mar 2024 03:54:16 -0500 (EST) (envelope-from ak@triklod.rs) Received: from ikilid (unknown [192.168.1.222]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mx.triklod.rs (Postfix) with ESMTPSA id 7EF7159681 for <9fans@9fans.net>; Fri, 1 Mar 2024 09:51:17 +0100 (CET) Date: Fri, 1 Mar 2024 09:53:58 +0100 From: Aleksandar Kuktin To: 9fans@9fans.net Subject: Re: [9fans] dd(1) takes very long Message-ID: <20240301095358.268edad4@ikilid> In-Reply-To: <6141BAD3-1BE6-40F5-B9BA-4BE94EAF752F@germteig.com> References: <6141BAD3-1BE6-40F5-B9BA-4BE94EAF752F@germteig.com> Mime-Version: 1.0 Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: 4c78eb10-d7a9-11ee-a029-814fff8b7b06 Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UMGZkNjQ0NGFjYjljNzgxMS1NOWRkNGJhNDFkNGI5MjI3NmQxMmEx?= =?UTF-8?B?ZjFmPg==?= List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> Content-type: multipart/mixed; boundary="----------=_1709283270-648936-0" Content-Transfer-Encoding: 7bit List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:M9dd4ba41d4b92276d12a1f1f:1:rWRQC4TW3zvVU_c4_FgoP6jPiDDAnAogF8D_6w4UwN4 ------------=_1709283270-648936-0 Content-Type: multipart/signed; boundary="Sig_/bQP1SAWSUxET8kwgjoiu08Q"; micalg=PGP-SHA1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit --Sig_/bQP1SAWSUxET8kwgjoiu08Q Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable >On Fri, 1 Mar 2024 09:24:15 +0100 >Marco Feichtinger wrote: > > The mirrored disks are 480GB ssds. >=20 > The copying with dd(1) took ~16 hours.=20 > Is that normal? >=20 > -marco Hi, a long-time lurker here. If 480 GiB are transferred over 16 hours, the implied transfer rate is 70 Mbps. If 480 GB are transferred, the implied rate is 66 Mbps. Both transfer rates are consistent with network interfaces that are in common use (100 Mbps Ethernet). They may or may not be consistent with internal system interfaces (SSDs are supposed to have much greater bandwidth). If both disks live in the same computer and the computer isn't a SBC bitty box, the transfer rate is weirdly low. --=20 Svi moji e-mailovi su kriptografski potpisani. Proverite ih. All of my e-mails are cryptographically signed. Verify them. -- You don't need an AI for a robot uprising. 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